体外预应力加固钢-混凝土连续组合梁的承载力分析  

LOAD-CARRYING CAPACITY ANALYSIS OF CONTINUOUS STEEL-CONCRETE COMPOSITE BEAMS STRENGTHENED BY EXTERNAL PRESTRESS

作　　者：聂建国[1] 温凌燕[1] 

机构地区：[1]清华大学土木系,北京100084

出　　处：《工程力学》2006年第1期81-86,共6页Engineering Mechanics

基　　金：国家杰出青年科学基金资助项目(50025822);北京市科委资助项目(955320100)

摘　　要：对体外预应力加固钢-混凝土连续组合梁的弹性阶段和极限状态进行了受力分析,考虑了预应力以及预应力筋内力增量对连续组合梁弯矩分布的影响。以力法原理为基础,分别建立了预应力加固连续组合梁在对称集中荷载作用下负弯矩区和正弯矩区屈服荷载以及极限荷载的计算公式,计算结果与两根试验梁的试验结果吻合较好。计算公式可供设计参考。Continuous steel-concrete composite beams strengthened by external prestress in both elastic and ultimate states are studied. The influence of prestress and its increment is considered. Based on the force method, formulae are proposed for calculating the yield and ultimate loads of the beams under symmetrical concentrated loads. Compared with the measurements of two specimens, the predicted results by the proposed formulae are accurate. The formulae are expected to be useful for design.

关 键 词：钢-混凝土连续组合梁 体外预应力加固 力法原理 屈服荷载 极限荷载 

分 类 号：TU318[建筑科学—结构工程]