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Showing 1 to 20 of 191 for “"girders"”.
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Model studies of box girders
Call number: LD2668 .T4 1969 J28
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Model studies of box girders
Call number: LD2668 .T4 1969 J28
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Flexural Behavior of CFRP-Pretensioned Girders
… and provide corrosion-free prestressed bridge girders. The application of this novel CFRP material in bridges necessitates understanding some of the critical parameters that affect the design and long-term behavior of prestressed concrete bridge beams. This dissertation comprehensively …
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Aspects of vibration in bridge-girders
A theoretical comparative study of methods for determining natural frequencies of vibration and their corresponding mode shapes is presented for the case of cantilevers, simply supported and continuous beam structures. Different methods are used, such as classical, energy and matrix methods. …
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The behaviour of curved hybrid girders
Curved girders are used in bridges to fit predefined alignment. Hybrid girders are an innovative use of high strength steel enabling optimising moment capacity. Previous studies of curvature and hybrid girder effects have been disjointed, focusing on curved homogeneous girders and straight hybrid …
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Reliability of corroded steel bridge girders
Corrosion is one of the main causes of deterioration of bridges. Structures exposed to harsh environmental conditions are subjected to time-variant changes of their load-carrying capacity. Thus, there is a need for an evaluation to accurately assess the actual condition and predict the remaining …
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Longitudinal Slab Splitting in Composite Girders
… slab splitting in composite hot rolled girders and joist girders was investigated. Two different type of framing configurations were studied with two tests conducted per configuration. The framing configurations were designated as either flush-framed or haunched, which describes the …
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Concrete Bridge Girders with Exposed Flexural Reinforcement
Reinforced concrete highway bridge girders are regularly repaired by replacing deteriorated concrete with new concrete, temporarily exposing the flexural reinforcement. The absence of bond between the concrete and steel at this stage makes it difficult to compute the flexural capacity and the …
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Self-Compacting Concrete for Prestressed Bridge Girders
… for the construction of precast prestressed SCC girders in the State of Minnesota. The primary objective of the research was to determine both short-term and long-term properties of SCC bridge girders, evaluate the applicability and accuracy of available test procedures, design equations, and …
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Analysis of Multicell Box Girders With Diaphragms
Made available in DSpace on 2014-12-08T23:56:51Z (GMT). No. of bitstreams: 1 6711817.pdf: 4745586 bytes, checksum: 307ccdc5bdfc566f806e68de973d2708 (MD5) Previous issue date: 1967
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Interface Shear Strength in Lightweight Concrete Bridge Girders
Precast girders and cast-in-place decks are a typical type of concrete bridge construction. A key part of this type of construction is developing composite action between the girder and deck. In order to develop composite action, adequate horizontal shear resistance must be provided at the …
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Fiber-Reinforced Polymer Bridge Girders for Extremely Aggressive Environments
… polymer (FRP) materials as primary bridge girders in medium span bridges (30 ft. to 75 ft.). The goal of this research is to identify the most efficient and cost-effective alternative for these corrosion-resistant materials and potentially extend the lifespan of these bridges up to 75 …
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Shear Strength Assessment of Corrosion-Damaged Prestressed Concrete Girders
… in the load-carrying capacity of the bridge girders. Consequently, decisions need to be made on whether to replace, retrofit, or load post these bridges. Extensive research has focused on the flexural strength of corroded prestressed concrete girders. This research studies the shear strength …
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C-Grid as Shear Reinforcement in Concrete Bridge Girders
… as the flexural reinforcement in bridge girders has been extensively studied. However, CFRP transverse reinforcement has not been as rigorously investigated, and many studies have focused on CFCC stirrups. The use of C-Grid as an option for transverse reinforcing has not been previously …
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Evaluation of moment redistribution for hybrid HPS 70W bridge girders
… that the use of hybrid steel bridge I-shaped girders (specifically sections incorporating Grade 50 webs and High Performance Steel (HPS) 70W flanges) can produce steel weight savings and overall design economy for a wide range of typical steel bridge superstructures. Additionally, recent …
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Repair of Steel Bridge Girders Damaged by Distortion-Induced Fatigue
Several studies have identified distortion-induced fatigue as the leading cause of cracks in steel bridges built prior to the mid-1980s. Experimental and computer simulations of 914-mm (36-in.) deep girder-cross frame subassemblies subjected to cyclic loading were carried out to study the effects …
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Nontraditional Limitations on the Shear Capacity of Prestressed Concrete Girders
It was also determined that the requirement for longitudinal tension reinforcement near the support included in the 4th edition of the AASHTO LRFD Bridge Design Specifications may underestimate the demand on longitudinal tension reinforcement. Alternatively an equilibrium based approach is …
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Static and Dynamic Response of Helically Curved Thin-Walled Girders
… dynamic response of helically curved thin-walled girders. The girder is assumed to possess a doubly symmetric, open cross-section with principal axes oriented in the directions of the normal and binormal vectors to the helical curve described by the cross-section center of gravity.
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CAD files and the computerized design of beams and girders
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1986.
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