基于ABAQUS的框—剪结构参数化建模

发布时间：2018-05-27 06:33

本文选题：ABAQUS + PMSAP　；参考：《沈阳建筑大学》2015年硕士论文

【摘要】：为更加准确地表现结构的抗震性能,需对体系复杂的高层、超高层结构进行罕遇地震下的弹塑性时程分析。而采用纤维模型和分层壳模型的通用有限元软件ABAQUS与采用集中塑性铰模型和墙体宏模型的传统结构工程软件相比,能够得到更为准确的分析结果,现已成为结构动力弹塑性分析的主要工具之一。但目前,基于ABAQUS平台建立复杂高层结构模型十分繁琐,耗时耗力,这制约了ABAQUS在结构动力弹塑性分析中的应用。为提高ABAQUS前处理建模效率,本文基于参数化有限元的建模思想开发了结构模型转换程序,实现将工程软件PMSAP模型转换为ABAQUS有限元模型,从而省略了ABAQUS的建模步骤,大大提高了复杂结构动力弹塑性分析的效率。基于Python编程平台,利用参数化建模思想,通过对PMSAP的几何、配筋以及荷载、质量等有效信息的提取,经过计算、直接转换等工序后改写成标准的IGES格式文件(软件通用中间格式),再将IGES文件导入到ABAQUS/CAE中,通过Python语言后台操纵ABAQUS内核,在CAE中进行细节修改(如重新细化网格等操作),之后生成CAE文件及inp文件。用户只需将CAE或inp文件提交,就可完成有限元计算分析。在实现快速建模的同时,较好地处理了单元网格划分、施工次序加载等细节问题。利用本文开发的转换程序,将五栋不同建筑结构体系的PMSAP模型转换为ABAQUS有限元模型,通过对比各结构在两软件中的模态分析结果验证该程序对模型节点、单元、材料、截面、荷载、质量、配筋等信息转换的正确性。最后,基于本文转换方案,对一框架剪力墙结构进行罕遇地震作用下的动力弹塑性分析。通过考察该结构的塑形损伤过程和底部塑性铰区的发展,对结构做出抗震性能评价。得到结构的薄弱部位及薄弱楼层等分析结果,说明结构在整体变形和层间变形方面均满足规范限值的要求。证明转换模型可以有效地模拟结构的抗震非线性反应,将转换程序应用于钢筋混凝土结构的动力弹塑性分析是实用的,极大地提高了建模与分析效率。
[Abstract]:In order to more accurately express the seismic performance of the structure, the elastoplastic time-history analysis of the complex high-rise and super-high-rise structures is needed. Compared with the traditional structural engineering software with concentrated plastic hinge model and wall macro model, the general finite element software ABAQUS using fiber model and layered shell model can obtain more accurate analysis results. It has become one of the main tools for dynamic elastoplastic analysis of structures. But at present, the establishment of complex high-rise structure model based on ABAQUS platform is very complicated and time-consuming, which restricts the application of ABAQUS in dynamic elastoplastic analysis of structures. In order to improve the efficiency of ABAQUS pre-processing modeling, based on the idea of parameterized finite element modeling, a structural model transformation program is developed in this paper, which realizes the conversion of engineering software PMSAP model to ABAQUS finite element model, thus omitting the modeling steps of ABAQUS. The efficiency of dynamic elastoplastic analysis of complex structures is greatly improved. Based on Python programming platform, by using the idea of parameterized modeling, through extracting the effective information of PMSAP, such as geometry, reinforcement, load, quality, etc. After direct conversion and other processes, it is rewritten to a standard IGES format file (software universal intermediate format), then the IGES file is imported into ABAQUS/CAE, and the ABAQUS kernel is manipulated by the Python language backstage. Make details changes in CAE (such as rerefine the grid, etc.), then generate CAE file and inp file. Users only need to submit CAE or inp files to complete the finite element analysis. At the same time, the details of cell mesh generation, construction sequence loading and so on are well handled. Using the conversion program developed in this paper, the PMSAP model of five different building structure systems is transformed into the ABAQUS finite element model, and the modal analysis results of each structure in the two software are compared to verify the program to model node, element, material and section. Correctness of information conversion of load, quality, reinforcement, etc. Finally, the dynamic elastic-plastic analysis of a frame shear wall structure under rare earthquake is carried out based on the transformation scheme in this paper. By investigating the plastic damage process of the structure and the development of the plastic hinge area at the bottom, the seismic performance of the structure is evaluated. The analysis results of the weak part and the weak floor of the structure show that both the integral deformation and the interstory deformation of the structure meet the requirements of the code limit. It is proved that the conversion model can effectively simulate the seismic nonlinear response of the structure. It is practical to apply the conversion program to the dynamic elastic-plastic analysis of reinforced concrete structures, and the efficiency of modeling and analysis is greatly improved.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU973.16

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