摘要
为研究钢混凝土连续组合梁在正常使用阶段的刚度计算方法,对3根反向加载的钢混凝土简支组合梁和3根2跨连续组合梁进行静载试验。研究结果表明:在负弯矩区采用只由钢筋和钢梁组成的完全开裂截面刚度计算连续组合梁的挠度过于保守,在计算中应充分考虑受拉刚化效应对负弯矩区截面刚度的影响;在考虑滑移效应的折减刚度的基础上采用等效刚度计算正常使用阶段连续组合梁的挠度,可以较大程度地提高挠度计算的精度。
In order to study the stiffness calculation method of composite steel-concrete continuous composite beams in service stage, static model tests were conducted on three simply supported steel-concrete composite beams under negative moment and three continuous two-span composite beams. The test results show that it is too conservative to calculate the deflection of continuous composite beams by using the cracked section stiffness which composed with reinforcements and steel girder in negative moment zone, and the influence of tension stiffening effect on the section stiffness in negative moment zone should be considered. Based on the consideration of reduced stiffness due to slip effect, the calculation precision can be increased if using the effective stiffness to calculate the deflection of continuous composite beams in service stage.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第8期3520-3526,共7页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51108281)
铁道部科技研究开发计划项目(2010G004)
河北省高等学校科学技术研究青年基金资助项目(2010277)
关键词
组合梁
截面刚度
模型试验
有效刚度
受拉刚化效应
composite beams
section stiffness
model test
effective stiffness
tension stiffening effect
