外包钢-混凝土组合梁正截面极限抗弯承载力的试验研究

作者:肖辉;李爱群;杜德润 刊名:东南大学学报(英文版) 上传者:任晓寅

【摘要】基于外包钢混凝土组合梁的试验研究和塑性理论,按照钢梁和混凝土塑性中和轴相对位置的不同,分别推导了完全剪切连接和部分剪切连接的外包钢混凝土组合梁的正截面极限抗弯承载力的计算公式,并对外包钢混凝土组合梁进行了非线性有限元分析,分析中重点考虑了材料非线性和接触非线性.8根完全剪切连接和3根部分剪切连接试件的正截面极限抗弯承载力的计算结果及有限元分析结果与试验结果吻合良好.

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Journal of Southeast University(English Edition) Vo1.21,No.2,PP.191—196 June 2005 ISSN l0o3—7985 Experimental study on ultimate flexural capacity of steel encased mcrete posite beamscon com OSl D Xiao Hui Li Aiqun Du Derun (Key laboratory of Concrete and Prestressed Co ncrete Structure of Ministry of Education,Southeast University,Nanjing 21(I)96,China) Abstract:Based on the experimental study and inelastic theory,the ultimate flexural capacity of steel encased concrete composite beams ale derived.111e diference between steel encased concrete composite beams with fuU shear connection an d be ams with partial shear connection,together with the relationship be twen the inelastic neutral axis of steel parts and concrete parts,are considered in the formulae.111e calculation results of the eiglt specimens with fuU shear con ection an d the thre specimens with partial shear con ection are in good agreement with the experimental data,which validates the efectiveness and eficiency of the propo sed calculation methods.Furtherm ore,the noniinear finite element an alysis of the ultimate flexural capacity of the steel encased concrete compo site beams is perform ed.Nonlinear material prope rties an d nord inear contact prope rties are considered in the finite element analysis.111e finite element analytical results also correlate wel wim the expe rimental data. Key words:stel encased concrete compo site be am ;ultimate flexural capacity;finite element an alysis Steel enca

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