摘要
根据混凝土的多轴徐变理论,基于弹塑性力学基本原理,采用比例加载方式研究了长期荷载作用对钢板混凝土(SCS)墙平面内极限承载力、钢板屈服时承载力(屈服承载力)和应力-应变关系的影响。在此基础上,分析了加载比例、截面配钢率等因素对长期荷载作用下SCS组合墙力学性能的影响规律。对比结果表明,长期荷载作用对SCS墙的极限承载力影响程度较小,对屈服承载力影响较大;在双轴受压和双轴拉压的受力状态下SCS构件屈服承载力显著降低,单元割线刚度减小;双轴受拉情况下SCS构件承载力几乎不变,割线刚度提高。
Based on the creep theory of concrete under multi-axial stresses and the basic theory of elastic-plastic mechanics, the effects of long-term loads on the in-plane ultimate bearing capacity, the yield bearing capacity and the stress-strain relationship were investigated by means of proportional load- ing mode. On the basis of the theoretical analysis, the influences of the loading ratio and the reinforce- ment ratio were discussed. The calculated results indicate that the long-term loads have a slight influence on the ultimate bearing capacity of SCS wall elements, but have a significant influence on the yield ca- pacity. The yield capacity and the secant stiffness of SCS elements have a decrease under the biaxial compression and the biaxial tension-compression. The capacity has little change under biaxial tension state, but the elements secant stiffness has an improvement.
出处
《低温建筑技术》
2017年第5期23-26,30,共5页
Low Temperature Architecture Technology
基金
国家重大专项(ZB01K08)
关键词
长期荷载
SCS墙
应力-应变关系
承载力
long-term load
SCS wall members
stress-strain relationship
bearing capacity
作者简介
曲楠（1992-），女，黑龙江牡丹江人，硕士，从事钢板混凝土结构力学性能相关方面研究。
[通信作者]宋晓冰（1968-），男，山东黄县人，上海交通大学副教授，博士生导师，研究方向，钢与混凝土组合结构等。
