建筑结构学报2013，Vol.34Issue(3)：93-99,7.
有限应变条件下滞回模式对Q460高强度结构钢的适用性
Applicability of cyclic stress-strain relation with limited strain to Q460 high strength structural steel
摘要
Abstract
The hysteretic behavior of structural steels with different strengths was experimentally investigated. The loading protocols including monotonically increasing strain amplitude, repeated strain amplitude and increasing cyclic tensile and compressive strain amplitude were adopted, to consider the steel behavior under random earthquake action. In this paper, the influences of different parameters, such as the thickness of steel plates, the yield strength and the loading protocol, on the hysteretic behavior of steel were studied. The results show that within the limited strain amplitude there is little difference in terms of the hysteretic behavior of steel with different plate thickness. Different steel grades with actually similar yield strengths exhibit similar hysteretic behavior. The influence of loading protocol on the hysteretic behavior of steel is not significant. The results also show that the structural steel behaves non-Masing property. Based on the testing results, a stress-strain model referring to the Ramberg-Osgood function was established, in which the parameters were adjusted with strain amplitude. Influences of the yield strength and loading protocol were taken into account in the hysteretic model. It is shown that the simulation of hysteretic behavior of Q460 steel by the suggested model could be in good agreement with corresponding test data.关键词
高强度结构钢/试验/滞回性能/数值模型Key words
high-strength steel/ experiment/ hysteretic property/ numerical model分类
建筑与水利引用本文复制引用
孙伟,陈以一..有限应变条件下滞回模式对Q460高强度结构钢的适用性[J].建筑结构学报,2013,34(3):93-99,7.基金项目
科技部国家重点实验室基础研究项目(SLDRCE08-A-04),国家自然科学基金重点项目(51038008). （SLDRCE08-A-04）
