国产低屈服点钢材循环加载试验研究  

EXPERIMENTAL STUDY ON DOMESTIC LOW YIELD POINT STEELS UNDER CYCLIC LOADING

作　　者：施刚[1] 王珣 高阳[1] 张勇[3] SHI Gang;WANG Xun;GAO Yang;ZHANG Yong(Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry,Department of Civil Engineering,Tsinghua University,Beijing 100084,China;East China Architectural Design&Research Institute Co.,Ltd.,Shanghai 200002,China;School of Civil Engineering,Beijing JiaoTong University,Beijing 100044,China)

机构地区：[1]土木工程安全与耐久教育部重点实验室,清华大学土木工程系,北京100084 [2]华东建筑设计研究院有限公司,上海200002 [3]北京交通大学土木建筑工程学院,北京100044

出　　处：《工程力学》2018年第8期30-38,共9页Engineering Mechanics

基　　金：国家自然科学基金优秀青年科学基金项目(51522806);国家自然科学基金项目(51478244)。

摘　　要：为研究不同荷载作用下国产低屈服点钢的材料力学行为,对LY100、LY160及LY225钢材共46个试件进行了单调拉伸试验及12种不同加载制度的循环加载试验。对国产低屈服点钢的单调性能、滞回性能、破坏形式、延性特征等进行了分析,并与其他结构钢材的力学性能进行了对比。结果表明,低屈服点钢在循环荷载作用下有明显循环强化现象,塑性变形能力强,且与普通钢材相比延性及耗能能力突出。该试验结果为后续研究低屈服点钢本构模型提供基础。To investigate the mechanical behavior of low-yield-point steels produced in China under various loadings,46 specimens of LY100,LY160,and LY225 were tested under monotonic tensile loading and 12 cyclic loading programs.The monotonic loading behavior,hysteretic behavior,failure modes and ductility performance of low-yield-point steels were analyzed and compared with other structural steels.The results indicate that low-yield-point steel shows obvious cyclic hardening characteristic and high capability of plastic deformation.Compared with other structural steels,the low-yield-point steel has better ductility and energy dissipation capacity.The results will provide the basis for future studies on the constitutive model of low-yield-point steels.

关 键 词：钢结构 低屈服点钢 单调加载 循环加载 试验研究 

分 类 号：TU391[建筑科学—结构工程]