發(fā)布時間：2018-05-27 06:33

  本文選題：ABAQUS + PMSAP��； 參考：《沈陽建筑大學》2015年碩士論文

【摘要】：為更加準確地表現(xiàn)結構的抗震性能,需對體系復雜的高層、超高層結構進行罕遇地震下的彈塑性時程分析。而采用纖維模型和分層殼模型的通用有限元軟件ABAQUS與采用集中塑性鉸模型和墻體宏模型的傳統(tǒng)結構工程軟件相比,能夠得到更為準確的分析結果,現(xiàn)已成為結構動力彈塑性分析的主要工具之一。但目前,基于ABAQUS平臺建立復雜高層結構模型十分繁瑣,耗時耗力,這制約了ABAQUS在結構動力彈塑性分析中的應用。為提高ABAQUS前處理建模效率,本文基于參數(shù)化有限元的建模思想開發(fā)了結構模型轉換程序,實現(xiàn)將工程軟件PMSAP模型轉換為ABAQUS有限元模型,從而省略了ABAQUS的建模步驟,大大提高了復雜結構動力彈塑性分析的效率�；�于Python編程平臺,利用參數(shù)化建模思想,通過對PMSAP的幾何、配筋以及荷載、質(zhì)量等有效信息的提取,經(jīng)過計算、直接轉換等工序后改寫成標準的IGES格式文件(軟件通用中間格式),再將IGES文件導入到ABAQUS/CAE中,通過Python語言后臺操縱ABAQUS內(nèi)核,在CAE中進行細節(jié)修改(如重新細化網(wǎng)格等操作),之后生成CAE文件及inp文件。用戶只需將CAE或inp文件提交,就可完成有限元計算分析。在實現(xiàn)快速建模的同時,較好地處理了單元網(wǎng)格劃分、施工次序加載等細節(jié)問題。利用本文開發(fā)的轉換程序,將五棟不同建筑結構體系的PMSAP模型轉換為ABAQUS有限元模型,通過對比各結構在兩軟件中的模態(tài)分析結果驗證該程序對模型節(jié)點、單元、材料、截面、荷載、質(zhì)量、配筋等信息轉換的正確性。最后,基于本文轉換方案,對一框架剪力墻結構進行罕遇地震作用下的動力彈塑性分析。通過考察該結構的塑形損傷過程和底部塑性鉸區(qū)的發(fā)展,對結構做出抗震性能評價。得到結構的薄弱部位及薄弱樓層等分析結果,說明結構在整體變形和層間變形方面均滿足規(guī)范限值的要求。證明轉換模型可以有效地模擬結構的抗震非線性反應,將轉換程序應用于鋼筋混凝土結構的動力彈塑性分析是實用的,極大地提高了建模與分析效率。
[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.
【學位授予單位】：沈陽建筑大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU973.16

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本文編號：1940863