高强型钢混凝土组合柱小偏心受压力学性能  

Mechanical properties of high strength steel reinforced concrete columns under small eccentric load

作　　者：杨怡亭 侯兆新[2] 李国强[3] 龚超[2,4] 陈素文[3] 邱林波[2,4] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中冶建筑研究总院有限公司,北京100088 [3]同济大学土木工程学院,上海200092 [4]国家钢结构工程技术研究中心,北京100088

出　　处：《哈尔滨工业大学学报》2016年第6期132-137,共6页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金(51408620);国家科技支撑计划项目(2012BAJ13B01)

摘　　要：为研究圆截面Q460高强钢混凝土组合柱在小偏压作用下的受力性能,进行了两根组合柱的工程性试验,对其破坏过程及特征进行分析,结果表明,钢骨有效限制剪切斜裂缝的发展,组合柱发生弯曲破坏,表现出良好的延性;采用有限元方法分析钢骨应力分布与变化规律,结果表明,混凝土压溃失效引起钢骨应力重分布,加剧了钢骨部分承担轴力和弯矩;对型钢屈服强度、含钢率进行有限元参数分析,结果表明,采用高强钢可有效提高承载力,同时控制构件截面尺寸与自重;对计算SRC柱压弯承载力的两种主要方法进行了比较分析,提出等效矩形概念的简化计算,为圆截面SRC柱设计提供依据.Experimental study on the behavior of circular Q460 high strength steel reinforced concrete （SRC） columns under small eccentric compression was conducted, to investigate the failure mode and failure process. The SRC column presents typical flexural failure and shows good ductility. The development of the diagonal crack is effectively confined by the encased steel. The stress distribution and development of the steel reinforcement were studied using finite element method. It indicates that stress redistribution occurs due to the crushing of concrete, which results in the increase of the axial force and moment applied to the steel. The parameter effects were investigated. The compression-bending capacity of the SRC column increases approximately linearly with the increase in the steel reinforcement strength and steel ratio. The design theory of SRC column is enriched based on the comparison analysis on the flexural strengths of the SRC column calculated by the universal superposition method and the N-M correlation curve.

关 键 词：高强钢 钢骨混凝土 偏心受压 有限元 等效矩形 

分 类 号：TU398[建筑科学—结构工程]