Search results
(241 - 260 of 267)
Pages
- Title
- Concrete flat slab design according to Chicago Building Department ruling
- Creator
- Chamberlin, Earl William
- Date
- 2009, 1915
- Publisher
- Armour Institute of Technology
- Description
-
http://www.archive.org/details/concreteflatslab00cham
Thesis (B.S.)--Armour Institute of Technology; Includes "Ruling on the design of...
Show morehttp://www.archive.org/details/concreteflatslab00cham
Thesis (B.S.)--Armour Institute of Technology; Includes "Ruling on the design of reinforced concrete flat slabs in the City of Chicago"
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- Title
- Design of brick pavement for Woodstock Illinois
- Creator
- Da Silva, Claudio Jose
- Date
- 2009, 1911
- Publisher
- Armour Institute of Technology
- Description
-
http://www.archive.org/details/designofbrickpav00dasi
Thesis (B.S.)--Armour Institute of Technology, 1911 B.S. in Civil Engineering, 1911
- Title
- Design of an approach for a proposed bridge across the Chicago River at La Salle St.
- Creator
- Converse, W. I., Larson, R. L, Cerny, James
- Date
- 2009, 1908
- Publisher
- Armour Institute of Technology
- Description
-
http://www.archive.org/details/designofapproach00conv
Thesis (B.S.)--Armour Institute of Technology, 1908
- Title
- Design of an automatic caisson excavator
- Creator
- Cole, Victor E.
- Date
- 2009, 1910
- Publisher
- Armour Institute of Technology
- Description
-
http://www.archive.org/details/designofautomati00cole
Thesis (B.S.)--Armour Institute of Technology
- Title
- A design of a 70 foot thru plate girder railroad bridge
- Creator
- Lewis, George Draper
- Date
- 2009, 1917
- Publisher
- Armour Institute of Technology
- Description
-
http://www.archive.org/details/designof70footth00lewi
Thesis (B.S.)--Armour Institute of Technology; Includes folded leaves in back pocket
- Title
- Design of highway suspension bridge across the La Grasse River at Massena Center, St. Lawrence County , N. Y.
- Creator
- Stewart, John L., Badger, Orville C
- Date
- 2009, 1913
- Publisher
- Armour Institute of Technology
- Description
-
http://www.archive.org/details/designofhighways00stew
B.S. in Civil Engineering, 1913.
- Title
- Design of a hollow dam and hydro-electric plant at French's Mills, N.Y.
- Creator
- Armstrong, Fred C., Edlund, Lawrence L, O'grady, Omar G.
- Date
- 2009, 1916
- Publisher
- Armour Institute of Technology
- Description
-
http://www.archive.org/details/designofhollowda00arms
Thesis (B.S.)--Armour Institute of Technology; Includes folded leaves in back pocket...
Show morehttp://www.archive.org/details/designofhollowda00arms
Thesis (B.S.)--Armour Institute of Technology; Includes folded leaves in back pocket Bibliography: leaf 75
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- Title
- Design of hydroelectric plant on Mississippi River, Moline, Illinois
- Creator
- Heeren, A. A., Vesely, J. C., Oldenburger, W.
- Date
- 2009, 1914
- Publisher
- Armour Institute of Technology
- Description
-
http://www.archive.org/details/designofhydroele00heer
Thesis (B.S.)--Armour Institute of Technology; Includes folded leaves in back pocket...
Show morehttp://www.archive.org/details/designofhydroele00heer
Thesis (B.S.)--Armour Institute of Technology; Includes folded leaves in back pocket Includes bibliographical references (leaf 44) and index
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- Title
- MECHANISMS OF FOAMING, EFFECTS, PREVENTION, AND CONTROL IN ANAEROBIC DIGESTION
- Creator
- Subramanian, Bhargavi
- Date
- 2015, 2015-05
- Description
-
Anaerobic digestion (AD) is an essential step to generate energy in the form of biogas from waste. Foaming during AD (AD foaming) is...
Show moreAnaerobic digestion (AD) is an essential step to generate energy in the form of biogas from waste. Foaming during AD (AD foaming) is widespread phenomenon and leads to deterioration of the AD process and operation. In extreme conditions, AD foaming poses a significant safety risk and considerable economic impacts. It is, therefore, necessary to understand the fundamentals of AD foaming to develop effective strategies that can help minimize and prevent the foaming impacts. Several aspects of AD foaming have attracted considerable research attention, however, the focus has been mainly on site specific causes and prevention. The work leading to this thesis was aimed to provide a better understanding of the AD foaming problem, to identify the underlying mechanisms, causes and contributors of foaming and to come up with foam management strategies for full-scale plants. Full-scale cylindrical digester investigations did not identify non-biological factors such as organic loading rate (OLR), mixing, and primary to waste activated sludge (PS:WAS) solids ratio as primary causes of foaming, but foam-causing filaments such as G. amarae and M. parvicella were determined to be primary causes. No foaming was observed over the duration of the study, indicating absence of a primary foaming cause even though the suspected contributors to AD foaming were present. In the case of full-scale egg-shaped digesters (ESD), foaming and foam collapse events were observed over the duration of the study over both during filamentous foaming and non-foaming seasons, indicating that the primary foaming cause requires the contributors to be present. The results of this study demonstrate that ESDs foamed due to high mixing and G. amarae counts above the threshold level (log #6 intersections/mg VSS) in mixed liquor. In both types of digesters, total solids and temperature profiles showed that reducing mixing frequency did not significantly impact digester performance or the homogeneity of the digester contents. Hence, mixing intensity optimization could be an effective strategy in addition to primary cause reduction of foam causing filaments.
Ph.D. in Environmental Engineering, May 2015
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- Title
- A STRUCTURAL ANALYSIS FRAMEWORK FOR CONCRETE FACED ROCKFILL DAMS
- Creator
- Quiroz, Juan E.
- Date
- 2013, 2013-12
- Description
-
Concrete Faced Rockfill Dams (CFRD’s) are commonly built around the world. As energy demands soar and construction methods evolve, the...
Show moreConcrete Faced Rockfill Dams (CFRD’s) are commonly built around the world. As energy demands soar and construction methods evolve, the interest for construction of CFRD’s with larger heights has increased tremendously. However, because of construction of higher CFRD’s, some dams have experienced considerable fractures at the concrete faces. Well known cases include Campos Novos (Brazil), Barra Grande (Brazil), and Mohale (South Africa), where in some instances these cracks have led to dewatering of the reservoir to allow for the concrete slabs repairs. The development of these fractures may be attributed to the highly deformable rockfill body. In general, the state-of-the-art design of CFRD’s is mostly based on common practice rather than rigorous analysis procedures. And as such, cracking problems because of deformability of the rockfill may not be properly predicted unless a detailed analysis is performed. In this work, a new framework for analysis of CFRD’s is developed that is capable of predicting the possible concrete-facing failure. As a part of this framework, a comprehensive non-linear finite element analysis (FEA) scheme is developed to model the construction sequence, the contact interaction between the concrete facing and the rockfill body, and the impounding of the reservoir. As a case study, using the developed framework, the Kárahnjúkar CFRD (Iceland, 198m height) is analyzed, the results are validated by the field measurements, and mitigation measures suggestions are provided. This methodology, based on the results of the investigation, provides guidelines and establishes a framework for analysis of CFRD’s that can be used for design purposes.. Keywords: CFRD, Concrete Faced, Rockfill, Dam, Finite Element Analysis.
PH.D in Structural Engineering, December 2013
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- Title
- MINIMUM COST DESIGN OF LOGISTICS NETWORKS WITH EXPEDITED SHIPPING SERVICES
- Creator
- Poghosyan, Karen
- Date
- 2014, 2014-12
- Description
-
This study analyzes and designs a logistics network for the distribution of four brands of passenger cars in the Great Lakes region. The study...
Show moreThis study analyzes and designs a logistics network for the distribution of four brands of passenger cars in the Great Lakes region. The study evaluates four types of distribution scenarios. Alternative 1 analyzes direct shipment method with only truck transportation mode from one distribution center located in the Chicago city to the cities in the Great Lakes region. Second alternative analyzes direct distribution method using multimodal transportation modes (railway and truck) from one distribution center to the cities included in this project. Third alternative analyzes peddling distribution method with only truck transportation mode from one warehouse to the project cities and the fourth alternative analyzes car distribution using direct shipment method with only truck transportation mode from two warehouses, where the main warehouse is located in Chicago city and the second warehouse is located in Indianapolis city. The analyses are conducted in order to determine the most cost-effective scenario for passenger car distribution in the Great Lakes region. The results of the study show that the most cost-effective scenario for passenger car distribution in the Great Lakes region includes using direct shipment method with multimodal transportation mode having one warehouse. However, this scenario has many uncovered sections such as we assumed that the warehouse and all destinations are located near to the railway yard and we do not need to transport cars from warehouse to the railway yard or from railway yard to the dealer by car huller truck/trailer. But in most of the time a railway yard and distribution center or a car dealership is not located in the same place or close to each other which in reality could increase the total cost for the logistics network. The second optimal cost provides the Alternative 1, which uses direct shipment method with only truck transportation mode and having one warehouse. This scenario is more practical and possible to use in reality without having significant changes in the total cost.
M.S. in Civil, Architectural and Environmental Engineering, December 2014
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- Title
- CONSTRUCTION MATERIAL TRACKING INVENTORY CONTROL SYSTEM USING SMART BLUETOOTH/NFC TRACKING DEVICES
- Creator
- Moiitat, Amir Ghasem
- Date
- 2016, 2016-05
- Description
-
Inventory control on a construction site is typically performed by an individual who regularly visits the storage area, directs personnel to...
Show moreInventory control on a construction site is typically performed by an individual who regularly visits the storage area, directs personnel to forward components to the construction area, and reports to the site office about the quantities remaining in the storage area. Automating this process is expected to reduce mistakes and save significant time. In this study, the potential use of Bluetooth technology is investigated in construction inventory control as a tracking device. Commercial Bluetooth tracking devices were examined to understand the different devices’ capabilities and to extract usable attributes and characteristics about each brand. After an extensive examination of several brands, one of the commercial Bluetooth tracking devices with the most suitable capabilities was chosen for this study. The Android smartphone was selected to act as a scanner in the storage area and a basic workflow was designed around the Android smartphone and the Bluetooth tracking device. In addition, to improve the performance of the Bluetooth tracking device, it was paired with Near Field Communication (NFC) tags that expedited the material tracking process. The “hybrid” tracking device is introduced as the key element of the inventory control system and an Android smartphone is used as an in-house scanner that captures the tracking device’s information and sends it to a server for analysis. An automated inventory control system that is designed to use the proposed tracking device can contribute greatly to construction site productivity.
M.S. in Civil Engineering, May 2016
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- Title
- Single leaf, double track trunion bascule bridge for interurban electric car
- Creator
- Leichenko, P. M., Holden, E. C., Lowenberg, M. L.
- Date
- 2009, 1912
- Publisher
- Armour Institute of Technology
- Description
-
http://www.archive.org/details/singleleafdouble00leic
Thesis (B.S.)--Armour Institute of Technology
- Title
- METHOD TO STABILIZE SUSPENDED DECKS IN DOUBLE WALLED STORAGE TANKS
- Creator
- Eric J, Gnade
- Date
- 2012-11-11, 2012-12
- Description
-
The safe storage of natural resources, such as liquefied natural gas or propane, is essential to the public and companies that distribute...
Show moreThe safe storage of natural resources, such as liquefied natural gas or propane, is essential to the public and companies that distribute these resources. Large diameter, double walled cylindrical storage tanks are the typical structure used to store these natural resources. One of the design factors that commonly govern the structural integrity of the tank is the design seismic response spectra. A component of the tank that is not given much consideration in the industry codes is the suspended insulated deck. The purpose of the deck is to provide a layer of insulation just above the liquid level of the product. This helps control the release of gases that boil off from the product. Despite this deck being made of thin plate material, this can be a considerable mass on large diameter tanks once the insulation and deck stiffeners are accounted for. The supports for the deck are typically one-half inch or sixteen millimeter square rods, which do not provide much lateral resistance. The concern this thesis investigates is what occurs to the suspended deck during an earthquake. By treating the outermost ring of rods as a moment frame, the summation of each rod’s lateral stiffness provides the total deck stiffness and natural period of the structure as a single-degree-of-freedom system. It is determined the standard design is likely to collide with other vital components of the tank under certain seismic events. In order to prevent the deck from potentially damaging these components, the conservative route is to increase the stiffness of the deck until the displacements are within an allowable range. viii This is done by installing a tank specific number of braced frames around the outer perimeter of the deck. The above procedure is a simple method to ensure there are no unexpected collisions between tank components. More time consuming methods, such as finite element analysis may show that the standard design can sufficiently withstand any collisions. However, the ability to provide a quick, easy solution with minimal added construction materials is a considerable advantage when ensuring the safety of the storage tank.
M.S. in Civil Engineering, December 2012
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- Title
- SYSTEMWIDE INTERSECTION SIGNAL TIMING OPTIMIZATION SIMULTANEOUSLY MINIMIZING VEHICLE AND PEDESTRIAN DELAYS
- Creator
- Roshandeh, Arash Moradkhani
- Date
- 2013, 2013-07
- Description
-
The ever-growing traffic volume especially in urban areas stretches the transportation system to be operated at near or exceeding capacity and...
Show moreThe ever-growing traffic volume especially in urban areas stretches the transportation system to be operated at near or exceeding capacity and causes congestion. Expanding system capacity and effectively utilizing available capacity could help reduce traffic congestion. In most of cases, adding extra travel lanes in dense urban street networks is not feasible any more due to land scarcity. This study introduces a new method for signal timing optimization that is carried out by adjusting green splits of AM peak, PM peak, and rest of the day timing plans for each signalized intersection in the network without changing the existing cycle lengths and signal coordination to minimize total vehicle and pedestrian delays per cycle. The proposed method contains a basic model that handles vehicle delays only and an enhanced model that simultaneously addresses vehicle and pedestrian delays using two different pedestrian delay estimation methods. Both models are incorporated into an agent-based regional travel demand forecasting tool for detailed traffic assignments using data on Chicago regional travel demand, traffic counts, geometric designs, and signal timing plans for major intersections in the Chicago Central Business District (CBD) street network. The computational experiment reveals that vehicle delays in the CBD area could reduce by 10 percent when only considering vehicle delays and 5 percent when simultaneously considering vehicle and pedestrian delays for signal timing optimization. Considering the intersections safety analysis, it has been found that signals timing optimization in all four areas combined without considering pedestrian delays decreased different crash types under various severities for multiple vehicle collisions as well as vehicle-pedestrian ones. Taking care of both vehicles and pedestrians delay xvi vii simultaneously, using HCM method, just a very few situations represent slight increases in crash frequencies and all other cases indicate crash reductions. Compared with the sensitivity analysis results using the HCM method for calculating pedestrian delays in the enhanced model applications, the Levinson method produces different results even though crash frequency reduction trends are almost the same as HCM method results.
PH.D in Civil Engineering, July 2013
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- Title
- AN INVESTIGATION INTO STABILITY OF TUBE AND COUPLER SCAFFOLDS SUBJECT TO SEISMIC LOADS
- Creator
- Najafabadi, Aram Zare
- Date
- 2012-11-23, 2012-12
- Description
-
Temporary structures are structures that are set up for applications in relatively short time periods, most notably category of which are...
Show moreTemporary structures are structures that are set up for applications in relatively short time periods, most notably category of which are scaffolds that are built in two types: supported and suspended. Tube and coupler scaffolding systems are supported types and are commonly used in nuclear industry’s applications. This study evaluates the behavior of this type of scaffolding system due to the effect of dead, live, i.e. weight of workers and equipment, and lateral earthquake loads applied on the structure. Consistent with OSHA dimensional requirements, six different configurations ranging from 1 to 3 stories and 1 to 2 bay scaffoldings have been selected for this study. Using a finite element analysis, the significance of all gravity loads, as well as potential seismic loads on the safety and stability of aforementioned scaffold types was studied. The seismic acceleration level at which the failure occurs was determined for four failure criteria. These criteria are: (1) the structural member yield failure; (2) the structural member buckling failure; (3) the system sliding failure; and (4) the system overturning (tip-over) failure. The analysis results show that the most critical failure mode for all configurations of tube and coupler scaffolds studied in this thesis occurred due to instability and as result of sliding. No overstress or buckling failure was observed to occur prior or concurrent to this failure. This finding reaffirms that this type of scaffolds has considerable sufficient capacity to resist their intended loads yet are vulnerable to instability because of sliding. With regards to the effect of number of bays and stories on the critical earthquake level, it was observed that as the number of scaffold stories increases, the critical earthquake level becomes smaller except for the case of the 1-bay scaffold for the 2- and xii 3-story configurations. Addition of an extra bay to a simple 1-bay scaffold configuration does not considerably improve the earthquake level at which the sliding failure occurs. With regards to time of failure, addition of stories to a scaffold configuration delays the failure occurrence in all cases except for the case of the 2-bay scaffold and addition of a bay does significantly delay the occurrence of failure for 1- and 2-story scaffolds, about 6 second for 1-story scaffolds, and 8 seconds for 2-story scaffolds. However, this improvement is negligible for 3-story scaffolds. In general, addition of a bay postpones the failure time. The evaluation of stress levels in all various scaffolding elements suggests that increasing the number of bays and/or stories does not generally affect the induced stresses in beams. In addition, the study shows that buckling and overturning (uplift) effects have very minimal effect on the failure of tube and coupler scaffolds.
M.S. in Civil Engineering, December 2012
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- Title
- Arched dams
- Creator
- Szeszychi, Ignatius Leo., Zack, Raymond R.
- Date
- 2009, 1911
- Publisher
- Armour Institute of Technology
- Description
-
http://www.archive.org/details/archeddams00szes
Thesis (B.S.)--Armour Institute of Technology, 1911 B.S. in Civil Engineering, 1911
- Title
- PROJECT SCHEDULING USING OPTIMIZED FINANCING
- Creator
- Alavipour, Seyyed Mohammadreza
- Date
- 2017, 2017-07
- Description
-
Contractors need financing throughout a project, mainly due to retainage, which is the money that the owner withholds to make sure that the...
Show moreContractors need financing throughout a project, mainly due to retainage, which is the money that the owner withholds to make sure that the project is performed properly by the contractor. Even if an owner does not withhold retainage, financing is still necessary because the periodic payments made by the owner are usually delayed. All pertinent studies conducted so far have considered only one source of financing without any consideration of different sources and types of financing, times of cash provisions, interest rates, and repayment options. Actually, if one assumes a predetermined credit limit and one source of financing, as past researchers have done, the optimal financing cost and the schedule that satisfies all constraints may be different than when several sources of financing and undetermined credit limit are considered. The main objective of this research is to focus on the optimization of financing cost by developing a financing optimization model based on different financing alternatives. Far lower financing cost and higher profit are obtained by using the proposed model compared to all models developed in past research. The research is conducted in four stages of development. In Stage 1, a financing optimization model is developed for a schedule that uses normal (not accelerated) activities, and early activity start and finish times. This model can be used before the contract is signed to offer the lower bid or can be used after the contract is signed to obtain higher profit. In Stage 2, the time-cost tradeoff algorithm is added to the model developed in Stage 1, considering accelerated activities between the crash and normal durations. In Stage 3, the model developed in Stage 2 is augmented by considering variable activity start times. Finally, in Stage 4, the model developed in Stage 3 is further improved by expanding time-cost tradeoff to allow for time extensions beyond the contract duration. All models developed in these four stages provide not only minimum financing cost, but also the ideal work schedule that achieves minimum total cost and maximum profit. Moreover, these models provide specific timings for borrowing and repaying funds.
Ph.D. in Civil Engineering, July 2017
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- Title
- ADVANCING KNOWLEDGE OF INDOOR AEROSOL SOURCES, FATE, TRANSPORT, AND CONTROL
- Creator
- Azimi, Parham
- Date
- 2016, 2016-12
- Description
-
Recent evidence suggests that particulate matter (of both indoor and outdoor origin) is one of the most important airborne pollutants driving...
Show moreRecent evidence suggests that particulate matter (of both indoor and outdoor origin) is one of the most important airborne pollutants driving adverse health effects worldwide. Despite our understanding of major indoor aerosol sources that contribute to adverse health effects across the population, gaps in our knowledge of some aspects of the sources, fate, transport, and control of indoor aerosols still remain. This dissertation focuses on filling three major gaps related to indoor aerosols. The first objective of this dissertation is to improve knowledge of the impacts of particle filtration in central heating, ventilation, and air-conditioning (HVAC) systems on fine particles smaller than 2.5 μm in diameter (i.e., PM2.5) and ultrafine particles smaller than 100 nm in diameter (i.e., UFPs) of outdoor origin that penetrate into the indoor environment. Results demonstrate that higher-efficiency HVAC filters can significantly reduce indoor proportions of outdoor PM2.5 and UFPs inside residences, but home vintage, climate zone, and ventilation strategy strongly influence the outcomes due to widely varying air exchange rates, HVAC system runtimes, and sources of ventilation air. The second objective of this dissertation is to improve knowledge of emissions and control of particulate matter from a recently established source of indoor pollutants: desktop three-dimensional (3D) printers. Median estimates of time-varying UFP emission rates ranged from ~108 to ~1011 #/min across all tested combinations, varying primarily by filament material and, to a lesser extent, bed temperature. It was also shown that UFP concentrations within close or moderate proximity to some desktop 3D printer and filament combinations can exceed recommended exposure levels. The most effective control strategies for reducing pollutant concentrations emitted from desktop 3D printers wereinstalling a high-flow spot ventilation system and operating the printer in a sealed enclosure with high efficiency gas and particle filtration. Finally, the third objective of this dissertation is to improve knowledge of the fate, transport, and control of infectious diseases in indoor environments through mathematical modeling of bioaerosol transmission and infection risk. Results demonstrate that Recirculating HVAC filtration can achieve risk reductions at lower costs of operation than equivalent levels of outdoor air ventilation, particularly for MERV 13-16 filters. It was also shown that in addition to the biological characteristics of respiratory pathogens, human activities, interzonal airflows, and physical properties of bioaerosols can substantially impact the infection transmission risk. Further, the dominant pathway for influenza transmission indoors under most conditions was airborne transmission. Finally, estimations of the back-calculated quanta generation rate for influenza viruses were directly in line with the existing data gathered from prior epidemiology studies.
Ph.D. in Environmental Engineering, December 2016
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- Title
- PUBLIC LITERACY ON SUSTAINABLE DEVELOPMENT
- Creator
- Panchal, Avani P.
- Date
- 2011-07-19, 2011-07
- Description
-
Reports suggest that Chicago is one of the leading US cities with respect to sustainability and, in order to promote sustainability in a city...
Show moreReports suggest that Chicago is one of the leading US cities with respect to sustainability and, in order to promote sustainability in a city like Chicago, it is imperative that the residents are aware of factors associated with sustainable development and contribute towards its advancement. Majority of the research conducted so far, does not examine the non-expert level of sustainability understanding. This thesis investigates the public literacy on sustainable development by conducting a survey and analyzing the generated database. The statements posed in the survey do not demand technical education but assess the non-expert resident literacy of sustainability by asking relevant subjects. The survey consists of four demographic questions (participants‟ gender, age, level of education and annual income), fifteen conceptual statements and five opinion statements, based on sustainability. The aim is to find a relation, if any, between the respondents‟ demographics and their responses to the survey. The database generated from the survey of 353 randomly selected individuals, is analyzed by four different statistical methods, which are arranged in increasing order of complexity – (i) descriptive statistics and z-test for proportions, (ii) contingency tables and Pearson chi-square test, (iii) exploratory factor analysis and (iv) multinomial logistic regression. The outcome of the statistical analyses suggests that approximately 50% of the participants have accurately responded to the survey and the non-expert resident does not know the definitions to pertinent sustainability concepts. Additionally, survey responses have a strong association with the participants‟ age. There is a weak association between answers and the respondents‟ gender and annual income. In spite of higher than average participants with a college degree, the level of education has a negligible relation with survey responses. Thus, it is necessary to increase the awareness and educate non-experts about sustainable development. It is promising to observe that the responses to the opinion statements suggest that individuals are willing to contribute towards sustainability provided they are educated about it. Nonetheless, the willingness to contribute requires action and without societal support, it is not possible to promote sustainability, which requires increased understanding and knowledge and willingness to act appropriately.
M.S. in Environmental Engineering, July 2011
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