基于有限元分析的高性能泵送混凝土框架结构变形研究  

Research on Deformation of High Performance Pumping Concrete Frame Structure Based on Finite Element Analysis

作　　者：丁新东 曹新明[1] Ding Xindong;Cao Xinming(Guizhou University,Guiyang 520025,China)

机构地区：[1]贵州大学

出　　处：《科技通报》2019年第11期173-176,181,共5页Bulletin of Science and Technology

基　　金：区域约束混凝土圆柱抗震性能试验研究(科研项目编号:黔科合LH字[2015]7085号)

摘　　要：针对当前方法存在单调荷载作用下位移曲线的变化与实际结果吻合度低、在大变形下混凝土框架结构的受力特性较差的问题,提出基于有限元分析的高性能泵送混凝土框架结构变形研究方法。首先,简单介绍了混凝土框架结构的受力特点;其次,通过内力来确定混凝土的预应力配筋,获得使用荷载时的性能参数,构建混凝土框架横梁各段曲线方程,当正负等效荷载总和等于零时,可以减小混凝土框架结构梁端反力给柱轴力所带来的影响,在此基础上,对混凝土框架结构的最大裂缝进行计算,能够得到混凝土框架构件的等效应力等条件;最后,利用有限元构建混凝土框架结构的平衡方程,对高性能泵送混凝土框架结构变形进行分析。最终实现了对高性能泵送混凝土框架结构变形研究。试验结果得到,在对高性能泵送混凝土框架结构变形研究时,提出方法在单调荷载作用下位移曲线的变化更接近实际结果,并且在大变形下混凝土框架结构的受力特性较好,验证了提出方法的有效性。For the current method,there is a problem that the variation of the displacement curve under the monotonic load is inconsistent with the actual result,and the stress characteristics of the concrete frame structure under the large deformation are poor.A research method for deformation of high performance pumped concrete frame structures based on finite element analysis.First,a brief introduction to the stress characteristics of concrete frame structures.Secondly,the prestressed reinforcement of concrete is determined by internal force,and the performance parameters when using the load are obtained,and the curve equations of each section of the concrete frame beam are constructed.When the sum of positive and negative equivalent loads is equal to zero,the influence of the reaction force of the beam end of the concrete frame structure on the axial force of the column can be reduced.On this basis,the calculation of the maximum crack of the concrete frame structure can obtain the equivalent stress and other conditions of the concrete frame member.Finally,the finite element method is used to construct the equilibrium equation of concrete frame structure to analyze the deformation of high performance pumping concrete frame structure.Finally,the deformation research of high-performance pumping concrete frame structure is realized.The experimental results show that when the deformation of high-performance pumped concrete frame structure is studied,the variation of the displacement curve under the monotonic load is closer to the actual result,and the stress characteristics of the concrete frame structure under the large deformation are better.Propose the effectiveness of the method.

关 键 词：有限元分析 高性能泵送 混凝土框架 结构变形 

分 类 号：TU312.91[建筑科学—结构工程]