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Title: Effects of elastomeric bearing pads on the behavior of multi-span concrete beams with bonded link-slabs
Authors: Douaihy, Elie Zakhia
Advisors: Gergess, Antoine 
Subjects: Concrete construction
Concrete beams
Issue Date: 2019
Jointless decks in multi-span bridge construction provide a cost effective solution by eliminating expansion joints. The construction procedure consists of providing simply supported spans using precast beam elements connected by a continuous reinforced concrete deck slab on top. The portion of the deck slab over the open joint at the intermediate supports is labelled as the link-slab. Current design procedures consist of debonding the link-slab from the precast beams near the intermediate supports to reduce its stiffness [1]. Nevertheless, bridge contractors prefer to keep the link-slab bonded to the precast beams as from a structural point they feel that the induced design forces in the bonded link-slabs are overestimated especially for bridges with elastomeric bearing supports [2]. This project examines the structural behavior of bonded link-slabs in multi-span bridges for various support conditions. It shows that elastomeric bearing pads reduce the link-slab induced forces. The project involves a comprehensive theoretical and experimental study where three reinforced concrete beams were tested under a static concentrated load using different support conditions. Data recorded was used to validate results from a numerical solution that was derived using Mathematica computer program [3]. The study confirms that the stiffness of the elastomeric bearing pads highly reduces the induced shear forces in the link-slab. A parametric study was then conducted for standard AASHTO type girders applications in the medium span length range to show the effects of the elastomeric bearings on the bonded link-slab structural behavior. Recommendations for designing bonded linkslabs were finally made and illustrated by a comprehensive numerical example.
Includes bibliographical references (p. 79-80).

Supervised by Dr. Antoine Gergess.
Rights: This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the personal and educational use exceptions must be obtained from the copyright holder
Ezproxy URL: Link to full text
Type: Thesis
Appears in Collections:UOB Theses and Projects

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