摘要
针对钢护筒钢筋混凝土组合结构的界面力学特征,开发了考虑损伤滑移效应的钢护筒-混凝土界面模型。在分析钢筋混凝土结构受力机理的基础上,对钢护筒和混凝土在三维尺度上的相对运动进行分解,进而建立钢护筒-混凝土界面模型的三维本构关系。选取混凝土的压缩应变作表征混凝土损伤程度的定量指标,并提出量化的计算方法来考虑混凝土的局部受压和滑移的耦合效应对界面荷载传递性能的影响。进行钢护筒-钢筋混凝土组合构件的受压性能试验,通过对比试验结果和模拟结果验证模型的适用性。
In view of the interfacial mechanical characteristics of steel reinforced concrete composite structure,we develop a steel casing concrete interface model with damage and slip effect. Based on the analysis of the force mechanism of reinforced concrete structure, we decompose the relative motion of steel cylinder and concrete on three dimensional scale,establish the three-dimensional constitutive relation of steel cylinder concrete interface model,choose the compressive strain of concrete as a quantitative index to characterize the damage degree of concrete,and put forward a quantitative calculation method to consider the influence of the coupling effect of local compression and slip on the load transfer performance of the interface. We carry out the compression performance test of the steel reinforced concrete composite component,and verify the applicability of the model by comparing the results of the test and the model results.
作者
刘建国
李鹏飞
汪承志
LIU Jian-guo;LI Peng-fei;WANG Cheng-zhi(College of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,Chin)
出处
《水运工程》
北大核心
2018年第7期177-181,共5页
Port & Waterway Engineering
基金
西部交通建设科技项目(2011660041)
国家自然科学基金项目(2011550031
51709026)
关键词
钢护筒
钢筋混凝土
界面模型
有限元
steel casting
reinforcement concrete
bond model
finite element