摘要
对美国《核设施相关钢结构设计规范》(ANSI/AISC N690-12)提出的钢板混凝土组合墙(SCS组合墙)的线弹性设计法进行了适用性分析。基于等效刚度的模型将钢板与混凝土等效为线弹性材料并进行了有限元分析。通过对文献中的3片SCS组合墙进行计算发现:该设计方法的等效刚度取值偏于保守,荷载-位移曲线与试验结果相比偏差较大;拉剪区单元控制墙体极限状态,而压剪区单元承载能力还相当富余。为解决该方法高估拉坏区单元刚度的问题,本文建议根据SCS单元主内力空间的不同区域设定弹性参数,以提高设计分析的准确度。
A feasibility analysis was carried out for the linear elastic finite element design method of steel-concrete-steel composite walls,which was proposed in the specification ANSI/AISC N690-12. It＇s suggested that the composite material of steel and concrete should be equivalent to a linear elastic material. This paper investigated the loading effects and resistance analysis of three SCS shear walls. It＇s found that the curve of load-displacement diverged from the experiment results because the value of effective stiffness was signally large. The elements subjected to tension and shear forces governed the ultimate bearing capability for SCS walls while the capability of elements subjected to compression and shear forces was quite redundant. This paper suggested an optimized method to calibrate the effective stiffness to solve the problem of overestimating the tension stiffness in ANSI/AISC N690-12. The elastic mechanical parameters should be determined according to the state of SCS elements in the interaction surface of principal force in order to improve the accuracy.
作者
李林家
宋晓冰
LI Linjia SONG Xiaobing(Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, Chin)
出处
《四川建筑科学研究》
北大核心
2017年第5期1-7,共7页
Sichuan Building Science
基金
国家科技重大专项(2011ZX06002-001)
关键词
钢板混凝土组合墙
等效刚度
单元设计法
主内力空间破坏包络线
设计规范
steel-concrete-steel composite wall
effective stiffness
SCS element analysis method
envelope curve in principle force
design specification
