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Title: Analysis of blast/explosion resistant reinforced concrete solid slab and T-Beam bridges.
Creator: Abdelahad, Firas A., Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: This study presents and illustrates a methodology to calculate the capacity of an existing reinforced concrete bridge under a non-conventional blast load due to low and intermediate pressures. ATBlast program is used to calculate the blast loads for known values of charge weight and stand off distance. An excel spreadsheet is generated to calculate ultimate resistance, equivalent elastic stiffness, equivalent elastic deflection, natural period of the beam, the maximum deflection, and the...
Show moreThis study presents and illustrates a methodology to calculate the capacity of an existing reinforced concrete bridge under a non-conventional blast load due to low and intermediate pressures. ATBlast program is used to calculate the blast loads for known values of charge weight and stand off distance. An excel spreadsheet is generated to calculate ultimate resistance, equivalent elastic stiffness, equivalent elastic deflection, natural period of the beam, the maximum deflection, and the maximum rotation in the support for a simple span solid slab and T-Beam bridges. The allowable rotation could be taken as to two degrees. Naval Facility Engineering Command (NAVFAC) approach was adopted, where the inputs were material properties, span length, and area of reinforcement. The use of the Fiber Reinforced Polymer for increasing the capacity of an existing bridge is also presented in this study. Parametric studies were carried out to evaluate the performance of the solid slab and T-Beam bridges under the assumed blast load.
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Date Issued: 2008
PURL: http://purl.flvc.org/fcla/flaent/EN00154040/68_1/98p0132d.pdf, http://purl.flvc.org/FAU/58001
Subject Headings: Concrete beams, Vibration, Bridges, Concrete, Fatigue, Reinforced concrete construction, Bridges, Concrete, Design and construction
Format: Document (PDF)

Title: Feasibility study of a prestressed concrete double-tee bridge system for interstate highways.
Creator: Badve, Anil Pandurang., Florida Atlantic University, Reddy, Dronnadula V.
Abstract/Description: This dissertation is a study of 1:3.5 scale model of a two-span transversely and longitudinally post-tensioned continuous double-tee bridge system, representing a target bridge of 70 ft. span. Theoretical analysis was carried out for comparison using different modelling techniques, such as isotropic and orthotropic material behavior, and the load distribution theory. Behavior of the bridge system was evaluated in terms of deflections, wheel load distributions, crack patterns and growth with...
Show moreThis dissertation is a study of 1:3.5 scale model of a two-span transversely and longitudinally post-tensioned continuous double-tee bridge system, representing a target bridge of 70 ft. span. Theoretical analysis was carried out for comparison using different modelling techniques, such as isotropic and orthotropic material behavior, and the load distribution theory. Behavior of the bridge system was evaluated in terms of deflections, wheel load distributions, crack patterns and growth with increasing number of cycles of fatigue loading. The precast model beams were assembled and tested at the Department of Ocean Engineering, Florida Atlantic University. AASHTO HS20-44 truck loading was simulated by applying constant amplitude fatigue loading at typical locations. The study established the feasibility and structural adequacy of the precast prestressed concrete double-tee concept for short and medium span interstate highway bridges for use in Florida and elsewhere.
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Date Issued: 1989
PURL: http://purl.flvc.org/fcla/dt/14513
Subject Headings: Prestressed concrete beams--Fatigue, Bridges, Concrete--Joints
Format: Document (PDF)

Title: FATIGUE BEHAVIOR OF JOINTS IN PRECAST PRESTRESSED CONCRETE DOUBLE TEE BRIDGE SYSTEM.
Creator: RAO, VENKATESWARA B., Florida Atlantic University, Arockiasamy, Madasamy, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: The feasibility of the use of double-tee beams in a bridge system is examined by conducting tests on a 1:3.5 scale model of a two-span transversely and longitudinally post-tensioned continuous double-tee beam system. Constant amplitude fatigue loading was applied on the model at typical locations simulating HS 20-44 AASHTO truck loading. The behavior of the bridge system was evaluated in terms of deflections, wheel load distributions, crack growth and patterns with increasing number of cycles...
Show moreThe feasibility of the use of double-tee beams in a bridge system is examined by conducting tests on a 1:3.5 scale model of a two-span transversely and longitudinally post-tensioned continuous double-tee beam system. Constant amplitude fatigue loading was applied on the model at typical locations simulating HS 20-44 AASHTO truck loading. The behavior of the bridge system was evaluated in terms of deflections, wheel load distributions, crack growth and patterns with increasing number of cycles of fatigue loading. A finite element analysis of the bridge system was done using plate and beam elements and results compared with experimental values.
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Date Issued: 1986
PURL: http://purl.flvc.org/fcla/dt/14332
Subject Headings: Prestressed concrete beams--Fatigue, Bridges, Concrete--Joints
Format: Document (PDF)

Title: Experimental studies on flexural behavior of CFRP retrofitted concrete members.
Creator: Raghavachary, Sowrirajan., Florida Atlantic University, Arockiasamy, Madasamy, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: The flexural behavior of rectangular concrete beams strengthened with externally bonded Carbon Fiber Reinforced Plastic (CFRP) laminates was studied by varying the number of plates bonded to their bottom tensile face. The increases in strength and stiffness of the beams provided by the bonded plates, over control beam without CFRP plates, were evaluated. Failure loads of the beams were determined by the ACI strain compatibility method using a FORTRAN software developed for this purpose. The...
Show moreThe flexural behavior of rectangular concrete beams strengthened with externally bonded Carbon Fiber Reinforced Plastic (CFRP) laminates was studied by varying the number of plates bonded to their bottom tensile face. The increases in strength and stiffness of the beams provided by the bonded plates, over control beam without CFRP plates, were evaluated. Failure loads of the beams were determined by the ACI strain compatibility method using a FORTRAN software developed for this purpose. The predicted collapsed load agrees reasonably well with the actual failure load. Precracked solid and voided slab bridge models retrofitted with varying number of CFRP laminates were used to evaluate their contribution to the flexural resistance. The increases in strength and stiffness of the retrofitted slabs were based on the deflections, strains and crack patterns at ultimate load. Theoretical analyses to predict the load-deflection behavior of the precracked sections were performed using PCFRAME software. The predicted values agree reasonably well with the experimental results.
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Date Issued: 1995
PURL: http://purl.flvc.org/fcla/dt/15120
Subject Headings: Fiber reinforced plastics, Reinforced concrete, Fiber, Bridges, Concrete, Prestressed concrete, Concrete beams--Fatigue
Format: Document (PDF)

Title: Static, fatigue and ultimate load behavior of bridges prestressed with advanced composite materials.
Creator: Sandepudi, Krishna Srinivasa., Florida Atlantic University, Arockiasamy, Madasamy, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: One of the major problems the construction industry faces today is low corrosion resistance of reinforcing and prestressing steel, which significantly affects the durability of concrete structures. Theoretically Advanced Composite Materials (ACM) can successfully be used in concrete structures, in lieu of steel, as reinforcing and/or prestressing elements, owing to high tensile strength, immunity towards corrosion, low Young's modulus, light weight and high fatigue resistance. Very little...
Show moreOne of the major problems the construction industry faces today is low corrosion resistance of reinforcing and prestressing steel, which significantly affects the durability of concrete structures. Theoretically Advanced Composite Materials (ACM) can successfully be used in concrete structures, in lieu of steel, as reinforcing and/or prestressing elements, owing to high tensile strength, immunity towards corrosion, low Young's modulus, light weight and high fatigue resistance. Very little experimental and performance data are available on the properties of ACM and their application in concrete structures. Thus, to ensure safety of the structures, accurate assessment and continuous performance monitoring of the ACM together with the structure have to be made with an option of active and/or passive structural control. This investigation is aimed to establish the feasibility of using Aramid Fiber Reinforced Plastic (AFRP) cables as reinforcing/prestressing elements in concrete bridge structures. Besides investigating the durability of the AFRP cables in adverse environments (alkali and seawater), static and ultimate load tests were performed on a Double-Tee beam and three rectangular beams together with static, fatigue and ultimate load tests on a half scale model Double-Tee bridge system prestressed with AFRP. The AFRP specimens exposed to alkali and seawater for 900 hours retained 88% of the average failure strength of control specimens. Large deformations at ultimate conditions and good fatigue resistance were observed in the experimental studies. A computer code, FRPFLEX, was developed to perform flexural analysis of beams prestressed/reinforced with the ACM. An incremental, stiffness augmented non-linear analysis was performed using grillage analogy to assess static flexural behavior of Double-Tee bridge system. Analytical results showed good correlation with experimental findings. An active deformation/vibration control model is suggested, which can be incorporated in prototype bridges for safety and performance data evaluation. Feasibility of the use of the AFRP cables in bridge structures is assessed based on the experimental and analytical parameters such as deflections, strains, crack distributions, crack widths and energy considerations.
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Date Issued: 1995
PURL: http://purl.flvc.org/fcla/dt/12414
Subject Headings: Prestressed concrete construction, Steel--Fatigue, Bridges--Fatigue, Fiber reinforced plastics
Format: Document (PDF)

Title: Behavior of precast single-cell segmental box bridges with external post-tensioning subjected to cyclic loading and temperature changes.
Creator: Sinha, Vikas., Florida Atlantic University, Arockiasamy, Madasamy, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: The behavior of a precast single-cell segmental box bridge with external post-tensioning is studied based on a 1:3.5 scale model of the Long Key bridge in the Florida Keys. Constant amplitude fatigue loading was applied on the model at a critical location simulating HS20-44 AASHTO truck loading. The performance of the bridge model was evaluated in terms of deflections, strains in concrete and across the joints, and behavior of joints between the segments with increasing number of cycles of...
Show moreThe behavior of a precast single-cell segmental box bridge with external post-tensioning is studied based on a 1:3.5 scale model of the Long Key bridge in the Florida Keys. Constant amplitude fatigue loading was applied on the model at a critical location simulating HS20-44 AASHTO truck loading. The performance of the bridge model was evaluated in terms of deflections, strains in concrete and across the joints, and behavior of joints between the segments with increasing number of cycles of fatigue loading. Thermal response of the bridge model was also studied using finite element analysis and the predicted temperature distributions were compared with the experimental values.
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Date Issued: 1991
PURL: http://purl.flvc.org/fcla/dt/14729
Subject Headings: Precast concrete construction--Fatigue, Post-tensioned prestressed concrete construction--Fatigue, Bridges, Box girder, Strains and stresses
Format: Document (PDF)

Title: Microcomputer and exsysp based expert system for selection and design of retaining structures.
Creator: Sinha, Anuradha., Florida Atlantic University, Arockiasamy, Madasamy, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: The automation of retaining structure selection and design by utilizing artificial intelligence tools is presented herein. The study involved the development of a microcomputer based expert system, RESTEX (REtaining STructure EXpert). The modules of the expert systems RETAININGEARTH, with M.1 knowledge base, and REFLEXYS have been updated and the resulting RESTEX modules are written in C using Exsys Professional for high speed and efficient utilization of memory. RESTEX is an interactive menu...
Show moreThe automation of retaining structure selection and design by utilizing artificial intelligence tools is presented herein. The study involved the development of a microcomputer based expert system, RESTEX (REtaining STructure EXpert). The modules of the expert systems RETAININGEARTH, with M.1 knowledge base, and REFLEXYS have been updated and the resulting RESTEX modules are written in C using Exsys Professional for high speed and efficient utilization of memory. RESTEX is an interactive menu-driven system consisting of modules for Structure Selection, Preliminary Design, Soils Classification, Stability Analysis, and Reinforcement Design. The system is capable of performing selection, analysis, and design of gravity walls, cantilever walls, counterfort walls, reinforced earth, gabion, cantilever and anchored sheet piles.
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Date Issued: 1993
PURL: http://purl.flvc.org/fcla/dt/14937
Subject Headings: Precast concrete construction--Fatigue, Post-tensioned prestressed concrete construction--Fatigue, Bridges, Box girder, Strains and stresses
Format: Document (PDF)

Title: Fatigue behavior of corrosion notched weathering steel samples.
Creator: Chen, Di, Granata, Richard D., Florida Atlantic University, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: Weathering steel has been a primary construction material for bridges in the United States. Notches caused by corrosion are observed on the flange of steel I-beams. These notches reduce the cross section area of the structure and are threats to bridge safety. A606-04 Type 4 cold rolled weathering steel samples were studied in this thesis to understand the effect of notches that caused by corrosion. Weathering steel samples were in the shape of plates, which simulated flange of I-beams. The...
Show moreWeathering steel has been a primary construction material for bridges in the United States. Notches caused by corrosion are observed on the flange of steel I-beams. These notches reduce the cross section area of the structure and are threats to bridge safety. A606-04 Type 4 cold rolled weathering steel samples were studied in this thesis to understand the effect of notches that caused by corrosion. Weathering steel samples were in the shape of plates, which simulated flange of I-beams. The plate samples were notched across their surfaces by applying electrical current through an electrochemical circuit composed of an anode, a cathode and electrolyte. Sixteen samples were notched and cut into appropriate shape for fatigue testing. S-N (Stress-Number of cycles to failure) diagram established from fatigue data indicated that the fatigue strength decreased below AASHTO category B. Weibull analysis was also performed to understand the reliability distribution.
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Date Issued: 2014
PURL: http://purl.flvc.org/fau/fd/FA00004092, http://purl.flvc.org/fau/fd/FA00004092
Subject Headings: Iron and steel bridges -- Corrosion, Protective coatings -- Evaluation, Reinforced concrete construction, Steel -- Fatigue, Steel, Structural -- Corrosion
Format: Document (PDF)

Bridges, Box girder (2)	+ -
Bridges, Concrete (2)	+ -
Bridges, Concrete--Joints (2)	+ -
Fiber reinforced plastics (2)	+ -
Post-tensioned prestressed concrete construction--Fatigue (2)	+ -

Precast concrete construction--Fatigue (2)	+ -
Prestressed concrete beams--Fatigue (2)	+ -
Reinforced concrete construction (2)	+ -
Strains and stresses (2)	+ -
Bridges--Fatigue (1)	+ -
Concrete beams (1)	+ -
Concrete beams--Fatigue (1)	+ -
Design and construction (1)	+ -
Fatigue (1)	+ -
Iron and steel bridges -- Corrosion (1)	+ -
Prestressed concrete (1)	+ -
Prestressed concrete construction (1)	+ -
Protective coatings -- Evaluation (1)	+ -
Reinforced concrete, Fiber (1)	+ -
Steel -- Fatigue (1)	+ -
Steel, Structural -- Corrosion (1)	+ -
Steel--Fatigue (1)	+ -
Vibration (1)	+ -

Florida Atlantic University (8)	+ -
College of Engineering and Computer Science (7)	+ -
Department of Ocean and Mechanical Engineering (6)	+ -
Arockiasamy, Madasamy (5)	+ -
Abdelahad, Firas A. (1)	+ -

Badve, Anil Pandurang. (1)	+ -
Chen, Di (1)	+ -
Department of Civil, Environmental and Geomatics Engineering (1)	+ -
Granata, Richard D. (1)	+ -
RAO, VENKATESWARA B. (1)	+ -
Raghavachary, Sowrirajan. (1)	+ -
Reddy, Dronnadula V. (1)	+ -
Sandepudi, Krishna Srinivasa. (1)	+ -
Sinha, Anuradha. (1)	+ -
Sinha, Vikas. (1)	+ -

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