钢筋混凝土框架异型边节点抗震性能试验研究及非线性分析-结构工程专业论文.docxVIP

西安建筑科技大学硕士学位论文钢筋混凝土框架异型边节点抗震性能 西安建筑科技大学硕士学位论文 钢筋混凝土框架异型边节点抗震性能 试验研究及非线性分析 专 业：结构工程 硕士生：朱佳宁 指导教师：白国良教授 摘 要 钢筋混凝土框架梁柱节点在地震作用下的非线性反应是框架结构抗震分析和抗震 设计的重要内容。本文针对电厂结构中常出现的框架异型边节点(变梁截面、变柱截 面)进行分析研究，共对4个1／5比例模型的边节点试件进行了拟静力试验，探讨了 钢筋混凝土框架异型边节点在低周反复荷载作用下其节点配箍率、梁柱截面高度、初 始偏心等对异型节点受力性能的影响。 本文基于Darwin-Pecknold正交异性混凝土本构模型，采用分离式有限元模型， 编制了钢筋混凝土非线形有限元分析程序。采用应力释放方法模拟混凝土开裂、压碎， 计算表明，该有限元模型与实验结果吻合较好。本文还分析了轴压比对异形边节点承 载力的影响。根据实验结果和有限元计算结果分析可知，异型边节点的抗剪承载力与 节点配箍率、小核芯面积有关。 关键词 楚墨墨型垫堇盛 塑垫能 辈鍪必析楚壹塞j§型 论文类型 应用基础 L 西安建筑科技大学硕士学位论文I 西安建筑科技大学硕士学位论文 I Aseismatic Behavior and Nonlinear Analysis of Abnormal Exterior Joints Of Reinforeed Concrete Frame Speciality：StructlJre Engineering Name：Zhu Jianing Supervisor：Pro．Bai Guoliang ABSTRACT The nonlinear response of beam-column joints of reinforced concrete frame under earthquake is all important part of seismic analysis and seismic design．Many research of normal joints have been made in many researches ofminfomed concrete frame．The paper focuses on the research of abnormal frame exterior joints that often occur in the reinforced concrete structure of power plants．Based 011 the pseudo-static test of four I／5-scaled abnormal exterior joints of reinforced concrete fiarne，the paper discussed the possible affections ofstirrup latio，the changes ofbeam or column sections and initial eccentricity to carrying capacity ofabnormal exteriorjoints． Based on the Darwin-Pecknolds orthotropic material model，a nonlinear finite element analysis programme are presented with saperating mode．The cracking and crushing for concrete is simulated with stress releasing show that the finite element model is aptitude for the abnormal exterior joint proved by test．The paper also analysised the affections of the axial compressive ratio on those joints．According to the test data and the calculating results，the paper proposes that the beating capacity of abnormal exterior joint are mostly depentent on the minor section areas and stirrup ratio，and that higher axial compressive ratio are di