钢筋混凝土梁柱组合体在低周交变加载下的滞回规律模拟研究-结构工程专业论文.docxVIP

重庆大学硕士学位论文 重庆大学硕士学位论文 中文摘要 摘 要 组合体梁外端挠度可看作是柱段变形引起的粱外端挠度、梁段变形引起的梁 外端挠度以及节点区变形引起的梁外端挠度三部分的叠加。其中，节点区变形包 括贯穿节点梁筋的滑移变形和节点剪切变形。 本文以节点的受力特性及规律为基础，基于若干梁柱组合体低周交变加载试 验的实测节点恢复力滞回曲线以及从中分离出来的贯穿节点的梁筋滑移变形结 果、节点剪切变形结果，分析总结得到有一定代表性的粱端剪力与贯穿节点梁筋 滑移之间和梁端剪力与节点剪切变形之间的滞回关系模型。贯穿节点粱筋的滑移 模型考虑了贯穿梁筋的相对直径、混凝土强度及轴压比三个因素，并根据试验结 果模拟出滑移量随循环次数的变化规律。节点剪切变形模型考虑了混凝土强度、 轴压比、剪压比、节点配箍特征值四个因素，并根据试验结果模拟出节点剪切变 形量随循环次数的变化规律。 梁段、柱段变形引起的梁外端挠度可利用已有悬臂柱低周交变加载模拟程序 计算，再通过几何关系换算得到。本文考虑节点区变形的影响，为原有程序组装 了节点区贯穿节点梁筋的滑移变形模型和节点剪切变形模型，得到梁柱组合体在 低周交交加载下的梁端荷载一位移滞回规律模拟程序。 本文编制程序的计算结果与试验结果对比表明，程序可较好地模拟节点的受 力规律及抗震性能。 关键词：梁柱组合体，框架节点，节点剪切变形，粘结滑移，滞回曲线 重庆大学硕十学位论文 重庆大学硕十学位论文 英文摘要 ABSTRACT The beam end displacement ofbeam-column subassemblage may be looked the superposition of three parts deformation that column deformation,beam deformation， and joint deformation．、)ivhere，joint deformation contain slip of longitudinal reinforcement passing throu出joint and shear deformation ofjoint． Based behavior of joint core under cyclic reversal load，according to actual measurement load—displacement hysteresis loops，slip of longjitudinal reinforcement passing through joint and shear deformation of joint in serial of beam—column subassemblage tests，the typical slip hysteresis model of longitudinal reinforcement passing through joint and typical shear deformation hysteresis model of joint proposed in this paper．Three factors，that beam reinforcement relative diameter, concrete intensity,axial compression ratio are considered in the model of slip of longitudinal reinforcement passing through joint，and the correlation between shear deformation and cycle number are simulated Four factors that concrete intensity,axial compression ratio，shear compression ratio，hoop reinforcement characteristic number are considered in the model ofjoint shear deformation，and the correlation between joint shear deformation and cycle number are also simulated． The b