往复荷载作用下高强方钢管高强混凝土纯弯性能研究  

Research on the Flexural Behavior of High-Strength Concrete Filled High-Strength Square Steel Tube Under Cyclic Loading

作　　者：邱增美 李帼昌[1] 杨志坚[1] QIU Zengmei;LI Guochang;YANG Zhijian(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学土木工程学院

出　　处：《建筑钢结构进展》2019年第6期62-71,共10页Progress in Steel Building Structures

基　　金：“十三五”国家重点研发计划(2018YFC0705704);辽宁省高等学校基本科研项目(LJZ2017004)

摘　　要：为了研究高强方钢管高强混凝土构件在往复荷载作用下的纯弯性能,采用ABAQUS有限元分析软件建立高强方钢管高强混凝土纯弯构件的数值模型,进行滞回性能的研究。基于已有高强方钢管高强混凝土纯弯构件试验的研究成果,将有限元分析结果与试验结果进行对比,验证了所建立数值模型的准确性。并运用此模型对不同钢材的屈服强度、不同核心混凝土的抗压强度以及不同含钢率的高强方钢管高强混凝土纯弯构件的弯矩-曲率骨架曲线和耗能情况进行对比分析,得出结论如下:构件的抗弯承载力随着钢材屈服强度或含钢率的提高而明显提高,而随着核心混凝土抗压强度的改变影响较小。最后,基于有限元分析结果与不同规范计算结果的对比,提出了一种适用于高强方钢管高强混凝土纯弯构件抗弯承载力的简化公式,为今后的工程应用提供参考依据。To study the flexural behavior of high-strength concrete filled high-strength square steel tube(HCFHST) under cyclic loading,a numerical model is built to analyze the hysteretic behavior of HCFHST under pure bending using ABAQUS finite element software in this paper.Based on the test data of HCFHST under pure bending,the numerical model is validated by comparing with the experimental results.In addition,in order to study moment-curvature envelope curves and energy dissipation,the numerical models of HCFHSTs are built separately with different steel yield strength,concrete compressive strength and steel ratio.The results show that with higher steel yield strength or steel ratio,the bearing capacity is higher,and the change of concrete compressive strength has little effect on the bearing capacity.Finally,by comparing the numerical study results with calculation results according to different standards,simplified formulas are proposed to predict the flexural capacity of HCFHST,which can provide more references for engineering application in the future.

关 键 词：高强方钢管 高强混凝土 数值分析 滞回曲线 抗弯承载力 

分 类 号：TU398[建筑科学—结构工程]