循环荷载下不锈钢力学性能建模方法  

Modeling method for mechanical behavior of stainless steel under cyclic loading

作　　者：孙治国[1] 杨葆洋 张震威 王东升 SUN Zhiguo;YANG Baoyang;ZHANG Zhenwei;WANG Dongsheng(Key Laboratory of Building Collapse Mechanism and Disaster Prevention,Institute of Disaster Prevention,China Earthquake Administration,Beijing 101601,China;School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]防灾科技学院中国地震局建筑物破坏机理与防御重点实验室,北京101601 [2]河北工业大学土木与交通学院,天津300401

出　　处：《地震工程学报》2022年第4期759-767,共9页China Earthquake Engineering Journal

基　　金：国家自然科学基金(51678150,51978167);河北省教育厅在读研究生创新能力培养资助项目(CXZZSS2020151);河北省重点研发计划项目(19275417D,21375405D)。

摘　　要：为研究不锈钢在循环荷载下的力学性能建模方法,基于OpenSees数值分析平台模拟国内外学者完成的奥氏体不锈钢和双相型不锈钢试件循环加载试验结果,以及配置奥氏体不锈钢的节段拼装桥墩拟静力试验结果。模拟结果与试验结果的对比表明:模拟得到的不锈钢循环加载下的应力-应变滞回曲线与试验结果吻合良好,数值模型可预测奥氏体不锈钢和双相型不锈钢在不同循环加载方式下的响应。不锈钢在单调加载与循环加载下的力学性能有较大区别,应分别建模和取值。配置奥氏体不锈钢的摇摆-自复位节段拼装桥墩滞回性能模拟结果与试验结果吻合较好,进一步验证了不锈钢力学性能建模方法的准确性。To study the numerical modeling method for mechanical behavior of stainless steel under cyclic loading,based on the OpenSees platform,the test results on specimens of austenitic stainless steel and duplex stainless steel under cyclic loading at home and abroad were simulated,and the quasi-static test results of precast segmental bridge pier with austenitic stainless steel were also simulated.All the simulation results were compared with the test results.It is found that the simulated stress-strain hysteresis curves of stainless steel under cyclic loading agree well with the test results,and the numerical model could predict the response of the austenitic and duplex stainless steels under different cyclic loading modes.The mechanical behavior of stainless steel under monotone loading is different with that under cyclic loading,so it should be modeled and valued separately.The simulation results of hysteretic behavior of the precast segmental bridge pier with austenitic stainless steel agree well with the test results,which further verifies the accuracy of the modeling method proposed in this paper.

关 键 词：奥氏体不锈钢 双相型不锈钢 循环荷载 滞回本构模型 

分 类 号：TU375.3[建筑科学—结构工程]