钢管初应力对钢管混凝土压弯构件承载力的影响研究  

EFFECT OF INITIAL STRESS ON BEARING CAPACITY OF CONCRETE-FILLED STEEL TUBULAR BEAM-COLUMNS

作　　者：韩林海[1] 尧国皇[1] 

机构地区：[1]福州大学

出　　处：《土木工程学报》2003年第4期9-18,共10页China Civil Engineering Journal

基　　金：福建省科技计划重大项目 (2 0 0 2H0 0 7)的资助

摘　　要：钢管初应力对钢管混凝土力学性能影响一直是众所关注的问题之一。首先进行了钢管初应力对方钢管混凝土压弯构件力学性能影响的试验研究 ,然后对考虑钢管初应力影响时 ,圆形和方形钢管混凝土压弯构件的荷载 变形关系曲线进行了理论分析 ,计算结果得到试验结果的验证。在此基础上 ,分析了初应力系数、构件长细比、截面含钢率 ,荷载偏心率、钢材和混凝土的强度等因素的影响规律 ,最终提出考虑初应力影响时 。The effect of initial stress on the bearing capacity of concrete filled steel tubular(CFST)beam columns are studied in the paper. It is found that these members are susceptible to the effect of initial stress during construction. The load deformation curve of a CFST beam column is proposed. The computing results are shown in good agreement with that of the test. Based on the theoretical model, influence of the initial stress ratio, slenderness ratio,strength of the materials, and sectional steel ratio are discussed. At last, formulas for the ultimate strength of a CFST beam column considered the effect of initial stress are developed.

关 键 词：钢管混凝土 初应力 压弯构件 承裁力 力学性能 荷载偏心率 

分 类 号：TU528.59[建筑科学—建筑技术科学]