【作者】 李帅； 侯超； 韩林海；

【Author】 LI Shuai;HOU Chao;HAN Lin-hai;Department of Civil Engineering,Tsinghua University;

【机构】 清华大学土木工程系；

【摘要】 本文通过有限元分析,研究了钢管混凝土叠合构件在压扭荷载作用下的力学性能。在考虑材料非线性以及钢-混凝土相互作用的基础上建立有限元模型,并利用试验数据对模型的准确性进行了验证,其后分析了压扭作用下钢管混凝土叠合构件的破坏形态及受力全过程。为进一步明晰材料间相互作用的实质,本文将钢管混凝土叠合构件中的钢筋混凝土、钢管混凝土部件在压扭荷载作用下的力学响应与普通的钢筋混凝土、钢管混凝土构件进行了比对,并分析了重要参数对钢管混凝土叠合构件力学性能的影响规律。更多还原

【Abstract】 This paper focuses on the analytical behavior of concrete-encased concrete filled steel tubular members(concrete-encased CFST members for short) under the combined effects of compression and torsion. A finite element modelling is developed, taking into account the nonlinearity of materials and the interactions between concrete and steel. Accuracy of the modelling is verified by test data. Full range analysis of the composite member is then presented. Typical failure modes of concrete-encased CFST members under combined compression and torsion are investigated. The behavior of RC and CFST component in concrete-encased CFST members are compared with those of individual RC members and CFST members under combined compression and torsion. Parametric analysis is carried out as well to evaluate the influence of significant parameters.更多还原