内配圆钢管的钢骨混凝土核心柱承载性能参数分析  

PARAMETER STUDY ON THE COLUMN REINFORCED BY INNER CIRCULAR STEEL TUBE UNDER AXIAL FORCE

作　　者：周君[1] 楼文娟[1] 孙军华[1] 

机构地区：[1]浙江大学建筑工程学院,浙江杭州310027

出　　处：《工程力学》2007年第7期128-133,155,共7页Engineering Mechanics

摘　　要：采用非线性有限单元法,考虑钢管对核心混凝土和箍筋对外围混凝土的约束作用,计算了内配圆钢管的钢骨混凝土核心轴压柱完整的荷载-应变曲线,详细分析了纵筋配筋率、箍筋配箍率、混凝土强度和钢骨配骨率等参数对轴压极限承载力和延性的影响,提出了使核心柱达到最佳承载和变形能力的参数范围,可直接应用于工程设计。最后根据所提出的合理参数范围推导了计算内配钢管壁厚的简化公式,从而使内配圆钢管的截面得以优化。工程实例计算表明简化公式具有良好的适用性。Using the method of the nonlinear finite element and numerical integration, the short steel reinforced concrete （SRC） columns reinforced by inner circular steel tubes are analyzed and calculated. With the program, the whole curve of ultimate bearing capacity in axial force is simulated. Effects of the ratios of longitudinal steel bars, different stirrup characteristic values, concrete grades from C40～C70, and ratio of inner steel tubes are discussed. The outlook of applied range of these parameters is also given. Results show that these ranges are reasonable and efficient, which can be used in engineering directly. A simplified formula to estimate the appropriate thickness of inner steel tube is put forward for optimizing the column. Application of this column in two actual engineering indicates the correction of this formula.

关 键 词：非线性有限元 钢骨混凝土 圆钢管 短柱 轴压性能 影响参数 

分 类 号：TU318[建筑科学—结构工程] TU312