预应力钢-混凝土连续组合梁的承载力分析  

Bearing capacity analysis of prestressed continuous steel-concrete composite beams

作　　者：聂建国[1,2] 陶慕轩[1,2] 

机构地区：[1]清华大学土木工程系,北京100084 [2]清华大学结构工程与振动教育部重点实验室,北京100084

出　　处：《土木工程学报》2009年第4期38-47,共10页China Civil Engineering Journal

基　　金：国家自然科学基金(50438020);长江学者和创新团队发展计划(IRT00736)

摘　　要：对预应力钢混凝土连续组合梁的承载能力进行分析。分析以求解无黏结体外预应力结构的基本理论框架为基础,重点考虑预应力筋内力增量对钢混凝土连续组合梁承载能力的影响,建立对称集中荷载下两跨预应力连续组合梁的开裂荷载、屈服荷载以及极限荷载这三个特征荷载的计算公式。分析结果表明,建立的计算公式计算三个特征荷载值具有较高的精度,理论计算值和试验值吻合良好,可供工程设计参考。A bearing capacity analysis is conducted for prestressed continuous steel-concrete composite beams. Based on the principal theory for the solution of externally prestressed structures without bond, accounting for the influence of the increase of tendon force on the bearing capacity of continuous composite beams, formulae for accurately calculating the three characteristic loads, crack load, yield load and ultimate load, of two-span prestressed continuous composite beams under symmetric concentrated loads, are proposed. The calculated load values are in good agreements with the test results.

关 键 词：预应力钢-混凝土连续组合梁 承载力 开裂荷载 屈服荷载 极限荷载 

分 类 号：TU318.1[建筑科学—结构工程]