FATIGUE-STRENGTH OF PRESTRESSED COMPOSITE STEEL-CONCRETE BEAMS

被引：27
|
作者：
ALBRECHT, P
LI, WL
SAADATMANESH, H
机构：
[1] CAD CON CONSULTING,VIENNA,VA 22182
[2] UNIV ARIZONA,DEPT CIVIL ENGN,TUCSON,AZ 85721
来源：
JOURNAL OF STRUCTURAL ENGINEERING-ASCE | 1995年 / 121卷 / 12期
关键词：
D O I：
10.1061/(ASCE)0733-9445(1995)121:12(1850)
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Effective prestressing increases the strength of existing composite steel-concrete bridges. Investigators have determined the static strength of prestressed composite girders, but without addressing fatigue strength-an important design factor in highway bridges. In this paper, 11 prestressed composite beams with a cover plate welded to the tension flange were prestressed with two seven-wire strands. In fatigue tests to failure, cracks initiated in the flange at the cover-plate ends. Stress ranges in the strands and at the base of the shear studs were too small to initiate cracks. Prestressing of the steel beam so that the stress in the tension flange alternates between tension and compression under cyclic loading raised the fatigue strength of the welded cover plates by one category, from D to C.
引用
收藏
页码：1850 / 1856
页数：7
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