新型外包钢-砼组合梁的理论分析  

Theoretical analysis of steel-encased concrete composite beams

作　　者：朱敏 马波 张磊[2] 

机构地区：[1]上海协鑫电力工程有限公司,上海200127 [2]上海工程勘察设计有限公司,上海200062

出　　处：《沈阳工业大学学报》2006年第6期697-700,716,共5页Journal of Shenyang University of Technology

基　　金：江苏省自然科学基金资助项目(BK2004064);江苏省建设系统科技项目(JS200321)

摘　　要：在新型外包钢混凝土组合梁试验研究的基础上,针对传统的弹性理论方法和塑性理论方法计算组合梁正截面抗弯承载力存在的不足点.根据试验结果,提出理论计算的假定,采用条带法推导其弹塑性状态下的正截面受弯承载力计算公式,并编制了计算程序,得到了7根组合梁整个受力过程中的弯矩曲率关系曲线.将程序计算结果与“矩形应力块”法的计算结果进行了比较,最后得到外包钢混凝土组合梁正截面抗弯极限承载力的简化计算公式.Based on the experimental research on the steel-encased concrete composite beams, and some existent deficiencies of elastic and plastic theory in calculating the bending strength of composite beam, some assumes for theoretical calculation are presented. For the composite beams, the bending strength of cross section was analyzed by the strip element method. The calculation procedure was programed and the moment-curvature curves were obtained. Results were compared with those based on the simplified rectangular block theory. Simplified calculation method for the new type of composite beam was proposed.

关 键 词：外包钢 组合梁 理论分析 正截面承载力 弯矩-曲率曲线 

分 类 号：TU398[建筑科学—结构工程] TU317.1