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Analysis and Design of Test Setup and Loading Fixture for Horizontally Curved Tubular Flange Girder Test Specimen.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Analysis and Design of Test Setup and Loading Fixture for Horizontally Curved Tubular Flange Girder Test Specimen./
作者:	Hampe, Kayla Marie.
面頁冊數:	1 online resource (260 pages)
附註:	Source: Masters Abstracts International, Volume: 74-05.
Contained By:	Masters Abstracts International74-05.
標題:	Civil engineering. -
電子資源:	click for full text (PQDT)
ISBN:	9781267707970

Analysis and Design of Test Setup and Loading Fixture for Horizontally Curved Tubular Flange Girder Test Specimen.
Hampe, Kayla Marie.

Analysis and Design of Test Setup and Loading Fixture for Horizontally Curved Tubular Flange Girder Test Specimen. - 1 online resource (260 pages)

Source: Masters Abstracts International, Volume: 74-05.

Thesis (M.S.)--Lehigh University, 2012.

Includes bibliographical references

A curved tubular flange girder (TFG) is an innovative curved steel I-shaped girder for highway bridges. The cross section of a TFG combines the flexurally-efficient open cross section of an I-girder with the closed cross section of a tube. A TFG has a steel tube as the top flange and either a steel tube or a flat steel plate as the bottom flange. TFGs are easy to fabricate and have a much greater torsional stiffness and strength than conventional curved I-girders. The curved TFGs studied here have a hollow-structural-section as the top flange and a flat steel plate as the bottom flange. A 2/3-scale test specimen with two curved TFGs braced by diaphragms has been designed, fabricated, and erected. Finite element (FE) models of the test specimen were developed by Ma and the FE results from these models were used in the present study. This thesis presents the test setup, and the FE analyses of the loading and the kinematics of the test specimen response. The thesis also describes how the FE results were used to design the loading fixtures for the tests. The test setup includes the test specimen, the bearings and the footings, the ground anchor rods used to react the loads, and the loading fixtures. A description of the location and layout of test setup is included and the design of the test specimen is explained. Information on the TFGs, the stiffeners, the diaphragms, and the diaphragm to TFG connections is presented. The bearings and the footings are described, followed by information on the ground anchor rods. The design of the loading fixtures, explained in this thesis, attempts to minimize the restraint of the test specimen and maintain stability of the loads as the test specimen displaces. Four different types of loading fixtures were designed to accommodate the geometry of the test specimen and the expected displacements of the test specimen based on the FE results. Seven loading fixtures are required to load the test specimen with 14 concentrated loads that produce load effects at mid-span similar to those of an idealized uniformly distributed load over the span. The idealized uniformly distributed load was selected to simulate actual loading conditions for a curved steel girder bridge. With each loading fixture, two assemblies, each comprised of a hydraulic jack and a series of steel plates, half-rounds, and steel rods, will pull down on a wide flange beam above the test specimen, and pull up on a pair of laced channels below the test specimen. The wide flange beam will bear down on the test specimen through two assemblies consisting of steel components, which include plates, half-rounds, and hollow-structural-sections. The channels will be anchored by the ground anchor rods that will resist the upward force.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9781267707970Subjects--Topical Terms:

561339
Civil engineering.
Subjects--Index Terms:

Curved girdersIndex Terms--Genre/Form:

554714
Electronic books.

Analysis and Design of Test Setup and Loading Fixture for Horizontally Curved Tubular Flange Girder Test Specimen.
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520 $a A curved tubular flange girder (TFG) is an innovative curved steel I-shaped girder for highway bridges. The cross section of a TFG combines the flexurally-efficient open cross section of an I-girder with the closed cross section of a tube. A TFG has a steel tube as the top flange and either a steel tube or a flat steel plate as the bottom flange. TFGs are easy to fabricate and have a much greater torsional stiffness and strength than conventional curved I-girders. The curved TFGs studied here have a hollow-structural-section as the top flange and a flat steel plate as the bottom flange. A 2/3-scale test specimen with two curved TFGs braced by diaphragms has been designed, fabricated, and erected. Finite element (FE) models of the test specimen were developed by Ma and the FE results from these models were used in the present study. This thesis presents the test setup, and the FE analyses of the loading and the kinematics of the test specimen response. The thesis also describes how the FE results were used to design the loading fixtures for the tests. The test setup includes the test specimen, the bearings and the footings, the ground anchor rods used to react the loads, and the loading fixtures. A description of the location and layout of test setup is included and the design of the test specimen is explained. Information on the TFGs, the stiffeners, the diaphragms, and the diaphragm to TFG connections is presented. The bearings and the footings are described, followed by information on the ground anchor rods. The design of the loading fixtures, explained in this thesis, attempts to minimize the restraint of the test specimen and maintain stability of the loads as the test specimen displaces. Four different types of loading fixtures were designed to accommodate the geometry of the test specimen and the expected displacements of the test specimen based on the FE results. Seven loading fixtures are required to load the test specimen with 14 concentrated loads that produce load effects at mid-span similar to those of an idealized uniformly distributed load over the span. The idealized uniformly distributed load was selected to simulate actual loading conditions for a curved steel girder bridge. With each loading fixture, two assemblies, each comprised of a hydraulic jack and a series of steel plates, half-rounds, and steel rods, will pull down on a wide flange beam above the test specimen, and pull up on a pair of laced channels below the test specimen. The wide flange beam will bear down on the test specimen through two assemblies consisting of steel components, which include plates, half-rounds, and hollow-structural-sections. The channels will be anchored by the ground anchor rods that will resist the upward force.
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