基于统一强度理论的哑铃型钢管混凝土柱极限承载力研究  

STUDY ON ULTIMATE BEARING CAPACITY OF DUMBBELL SHAPED CONCRETE-FILLED STEEL TUBULAR COLUMN BASED ON TWIN SHEAR UNIFIED STRENGTH THEORY

作　　者：李艳[1] 赵均海[1] 梁文彪[1] 张冬芳[1] 

机构地区：[1]长安大学建筑工程学院,西安710061

出　　处：《工业建筑》2013年第5期137-143,共7页Industrial Construction

基　　金：国家自然科学基金资助项目(50908015);陕西省自然科学基金资助项目(2011JM7002);教育部博士点基金资助项目(20110205130001)

摘　　要：采用双剪统一强度理论,考虑中主应力和材料拉压比的影响,全面地考虑钢管、腹板、钢管内混凝土和腹腔内混凝土对构件极限承载力的贡献,同时,考虑钢管和腹板对混凝土的约束作用,引入哑铃型截面考虑长细比、偏心率和初应力影响的折减系数,推导出哑铃型钢管混凝土柱的极限承载力公式,并对影响参数进行分析。将计算结果与试验结果及相关文献的计算结果进行对比,吻合良好,验证了公式的合理性。Based on twin shear unified strength theory, the contributions of steel tube, web, concrete in the steel tube and cavity and constrains provided by steel tube and web were considered. Whilst co,sidering the influence of slenderness ratio, eccentricity ratio and initial stress for dumbbell shaped cross-section, the ultimate bearing capacity formula for dumbbell shaped concrete-filled steel tubular column was developed by two methods, and the impacts of some relevant parameters were analyzed as well. Through comparing the results of proposed formula with that of experiments and relevant literatures, the rationality of proposed formula was proved.

关 键 词：统一强度理论 哑铃型 钢管混凝土柱 极限承载力 

分 类 号：TU398.9[建筑科学—结构工程] TU312