钢筋混凝土框架结构非线性分析研究-结构工程专业论文.docxVIP

州济人学申请硕士学位论文 州济人学申请硕士学位论文 摘要 摘 要 对钢筋混凝土框架进行非线性全过程反应分析，是深入了解框架结构抗震 性能的重要途径。本文主要对钢筋混凝土框架结构的非线性分析方法进行了研 究。主要包括四部分内容： 第一部分，探讨了剪切变形的计算方法，对桁架模型和修正的斜压场模型进 行了对比分析，建议了按拓展的斜压场计算梁抗剪刚度的实用计算方法。 第二部分，利用非线性有限元的分析原理，研究了包括剪切变形、节点的 粘结滑移、刚域等多种因素的影响在内的有限元计算方法，编制了钢筋混凝土框 架的非线性分析程序，将其应用于一双层双跨高性能钢筋混凝土框架的非线性反 应分析之中，计算结果与试验结果吻合良好。同时，还考察了剪切变形及节点的 粘结滑移引起的变形在框架受力过程中的分布情况。 第三部分，利用多分量的杆系模型，进行了混凝土框架的非线性分析，研究 了多分量杆系模型和有限元分析模型的等价性问题，结果表明，多分量杆系模型 与有限元方法取得了较好的一致。 最后，进行了对影响剪切变形和节点粘结滑移的各项参数的研究，考察了当 影响剪切变形及节点粘结滑移的各种因素发生变化时，引起的框架变形、内力变 化情况。 关键词：框架结构，抗剪刚度，剪切变形，粘结滑移，有限元，滞回分析，非线 ，睦 l迸济犬学审诸坝七学位论文 l迸济犬学审诸坝七学位论文 攮要 ABS譬RAC蕈 The full—flange nonlinear analysis of reinforced concrete frame is very important for learning seismic performance of concrete frame structures．Methods of nonlinear analysis ofreinforced concrete frame are studied in this paper．It consists of four parts： In the first part，dasto—plastic analysis methods of shear stiffiaess are discussed。 The modified compression field theory and truss model file compared．Based on the analysis results，extended modifled compression field theory in describing shear stiffness is proposed． In the second part，on the principle of nonlinear finit dements，a program is compiled．The effects of shear-defomaation，bond slip of RC joints are considered in the program．Imitative calculations of a two—span and two—story frame structure are carried out，and the analytical results show good agreement with experimental results．In addtion，this part presents the different influence of shear deformation and bond slip ofjoints on the deformation and intenlal force offrame during loading． In the third part，a improved model based on several mechanisms which consist of flexural rotMion，shear deformation and bond slip of RC joints is presented．The nonlinear analysis of two frames is carried out，髓le analytical results show very good agreement with analysis results ofnonlinear finit element。 In the last part．The effect of different parameters V8ried include effects of shear deformation an