预应力组合梁长期性能试验研究与时随分析  

Experimental study and time-dependent analysis of prestressed steel-concrete composite beam

作　　者：薛伟辰[1] 李杰[1] 何池[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《中国公路学报》2003年第4期40-43,共4页China Journal of Highway and Transport

基　　金：上海市科技发展基金项目(992012044)

摘　　要：在中国首次进行了预应力组合梁长期性能的试验研究。通过一年长期荷载试验,对预应力组合梁的长期变形、预应力筋应变、钢梁应变、钢梁与混凝土板之间的滑移等时随性能进行较为系统的研究,并提出了预应力组合梁长期变形的设计建议。基于龄期调整有效模量法,推导了预应力组合梁单元的徐变刚度矩阵和徐变力向量,编制了预应力组合梁时随分析程序,应用该程序的计算值与试验结果吻合较好。It is the first time that experimental study on longterm performance of prestressed steelconcrete composite beam is carried out in China. Based on oneyear longterm experiments, timedependent behaviors, longterm deformation, strain of prestressing bar, strain of steel beam, slip of shear connectors, et al, are systematically studied, and design suggestions on longterm deformation of prestressed steelconcrete composite beam are put forward. In addition, on the basis of ageadjusted effective modulus method, creep stiffness matrix and creep force matrix of prestressed steelconcrete composite beam element are derived. Program of timedependent analysis of prestressed steelconcrete composite beam is developed, and calculations by using the program are in good agreement with test result.

关 键 词：桥梁工程 预应力组合梁 龄期调整有效模量法 长期性能试验 时随分析 

分 类 号：U443.35[建筑科学—桥梁与隧道工程]