冷弯薄壁型钢构件承载力计算方法对比研究  

Comparative Study on Calculation Methods of Bearing Capacity of Cold-Formed Thin-Walled Steel Members

作　　者：王春刚[1] 孔德礼 张耀春[2] 

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168 [2]哈尔滨工业大学土木工程学院,哈尔滨150090

出　　处：《建筑钢结构进展》2017年第6期51-59,共9页Progress in Steel Building Structures

基　　金：辽宁省自然科学基金(201602636);沈阳市科技计划项目(F16-205-1-14);沈阳建筑大学学科涵育项目(XKHY2-12)

摘　　要：以试验数据为依据,分别采用我国现行规范有效宽度法、规范拟修订稿有效宽度法和直接强度法计算了202个轴压构件、62个受弯构件、55个压弯构件的稳定承载力,通过试验值与计算结果的对比,综合研究了3种方法之间的差异性,对可靠度进行了定性分析。结果表明,拟修订的有效宽度法和直接强度法所得试验值与计算值之比的平均值更接近于1.0,且计算结果偏于安全,优于现行规范有效宽度法。从变异系数的结果可以看出修订有效宽度法和直接强度法的计算结果相差不大,并且它们的离散性都比现行规范有效宽度法小。Based on test data,the bearing capacity of 202 axial compression members,62 flexural members and 55 beam-columns are calculated using the effective width method,the revised effective width method and the direct strength method respectively.The calculation results are compared with test data in order to compare these three methods and make the qualitative analysis of reliability.It is shown that the average value of the ratio of experimental value to calculation value of the revised effective width method and the direct strength method are close to 1.0 on the safe side.They are all better than the current standard effective width method.From the results of the coefficient of variation,it can be seen that calculation results of the revised effective width method and the direct strength method have little difference,and the discrepancy is also smaller than the effective width method in the current specification.

关 键 词：冷弯薄壁型钢 构件承载力 有效宽度法 直接强度法 畸变屈曲 

分 类 号：TU392.1[建筑科学—结构工程]