rc框架填充墙计算模型分析及应用分析-calculation model analysis and application analysis of rc frame infilled wall.docx

摘要震害调查表明，填充墙引起的刚度分度不均匀和对局部构件的约束效应会对 框架产生不利影响。而现行结构设计规范没有提出能够考虑该不利影响的方法， 对框架填充墙的精细化建模是一条可行的出路。本文采用有限元分析方法提出一 种实用的 RC 框架填充墙修正杆系模型。主要研究工作如下：①总结并选择合理的填充墙框架精细有限元建模方法，采用 ABAQUS 分析软件对已有单层单跨填充墙框架试验进行模拟，验证了精细有限元建模方法的正确 性，为后续数值模拟打基础。②对开洞填充墙框架进行精细有限元建模的非线性分析，以典型窗洞、门洞 填充墙为例，研究水平荷载在开洞填充墙中的传递路径，总结洞口大小和位置对 填充墙框架水平承载力、抗侧刚度和框架柱内力的影响规律，验证考虑洞口影响 的必要性。③针对开洞填充墙和非开洞填充墙分别提出修正杆系计算模型。通过单榀框 架的精细有限元模型和杆系模型计算结果对比，验证本文模型的正确性。④建立带斜撑的多层填充墙框架模型，研究刚度分布对框架性能的影响。计 算结果与震害经验相比较，证明填充墙修正模型对于多层框架建模分析的合理性。关键词：开洞填充墙，非线性分析，计算模型，约束效应，刚度分布ABSTRACTAccording to the survey report on seismic hazards, unevenly-distributed stiffness as well as the constraint effect to part components may have negative influence on frames, due to infills. But none of the existing codes provide feasible methods to deal with these problems. Modeling infills in frame may be an available choice. Practical model of infills are studied in this paper by finite element analysis method. The main achievements are listed as below:①Modeling methods of infilled frame are summarized and a reasonable method isselected among them. A simulation of previous test by using ABAQUS is made to make sure the finite element parameters to be right, so that the further analysis can be reliable.②A nonlinear analysis of infilled frames with opening is made by detailed finiteelement modeling. Loads transfer paths are studied by taking infilled frames with window or door as examples. Influences of opening dimensions and locations on the horizontal capacity, lateral stiffness and column inner force of infilled frames are summarized to verify the necessity of considering opening effects.③Truss numerical models of infills with opening as well as infills without openingare pursued and verified respectively. A comparison between detailed finite element model results and these of truss bar model is made to verify the validity of truss model by setting up one-storey and one-bay frame models.④Truss models of infilled frames are established to study the influence of stiffn