托梁抽柱施工过程模拟方法的研究

发布时间：2018-05-29 04:35

本文选题：托梁抽柱 + 施工模拟　；参考：《哈尔滨工业大学》2014年硕士论文

【摘要】：当今社会的大形势下，越来越多的建筑由于各种原因需要进行加固改造，其中托梁抽柱被广泛的应用于实际工程中。往往是由于建筑功能的变化需要更大的空间，所以依靠托梁抽柱工程来抽除柱子以增大使用空间。抽柱过程施工难度比较大，，因此在施工前对托梁抽柱的施工过程进行模拟，能够更好的了解其过程中内力的变化规律，从而在一定程度上可以保证整个托梁抽柱工程的安全。本文研究的目的是在研究托梁抽柱施工过程模拟方法的过程中，找到相对比较符合实际的模拟方法和分析施工过程中结构内力变化的规律。本文以深圳市南山区益田假日广场的苹果旗舰店托梁抽柱工程为背景，按照此工程中的施工过程和施工方法建立本文模拟的施工过程模型。本文中，将采用有限元分析软件ABAQUS对建立的整个实体平面框架模型进行托梁抽柱施工过程的模拟分析，分析过程以结构已有荷载作用下的内力和变形为初始状态。整个分析过程分为三个阶段：顶升阶段，切柱阶段和卸载阶段。本文根据重要性将主要研究切柱阶段和卸载阶段的结构动力响应，在切柱阶段的研究中包含了顶升过程，但顶升过程不考虑动力效应采用静力分析。本文最关键的部分是切柱过程的模拟分析，本文采用了三种不同方法(瞬时加载法，一次切柱的生死单元法，逐步切柱的生死单元法)模拟切柱过程。将三种模拟方法进行比较，通过对比得出逐步切柱生死单元法进行切柱分析的优点。通过在不同顶升力作用下对结构进行切柱过程模拟，得出切柱过程中的顶升力大小决定了最后结构动力响应的大小的结论。对卸载过程的模拟部分，本文考虑不同的卸载速度对结构在卸载过程中动力响应大小的影响进行分析，得出结构卸载完成后的最终状态与卸载速度的几点关系。本文还对施工模拟结果与实际监测结果进行了对比研究，将切柱过程和卸载过程的模拟结果与实际工程监测数据进行变化趋势的对比。采用深圳市南山区益田假日广场的苹果旗舰店托梁抽柱工程中的监测数据，与本文的施工模拟计算结果进行趋势上的对比，证明本文的模拟方法的合理性和正确性。
[Abstract]:Nowadays, more and more buildings need to be strengthened and reformed because of various reasons. Among them, beam pumping columns are widely used in practical projects. Because of the change of building function, more space is needed, so it is necessary to remove the columns in order to increase the use space. The construction process of pumping column is difficult, so the simulation of the construction process before construction can better understand the law of variation of internal force in the process, thus to a certain extent can ensure the safety of the whole project. The purpose of this paper is to find a more realistic simulation method and to analyze the law of internal force variation in the construction process of supporting beam and column pumping in the course of studying the simulation method of the construction process. In this paper, the construction process model of this paper is established according to the construction process and the construction method of the construction process based on the construction process and construction method of the Apple flagship store support beam pumping project in Yitian Holiday Square, Nanshan District, Shenzhen City. In this paper, the finite element analysis software ABAQUS is used to simulate the construction process of the whole solid plane frame model. The initial state of the analysis process is the internal force and deformation of the structure under the existing load. The whole analysis process is divided into three stages: lifting stage, cutting stage and unloading stage. In this paper, the dynamic response of the structure in the shear stage and the unloading stage is mainly studied according to its importance. The lifting process is included in the study of the shear column stage, but the static analysis is adopted in the uplift process without considering the dynamic effect. The most important part of this paper is the simulation and analysis of the column cutting process. Three different methods (instantaneous loading method, the life and death element method of the first cut column, the life and death element method of the step by step column cutting) are used to simulate the cutting column process. By comparing the three simulation methods, the advantages of the stepwise cutting column birth and death element method are obtained. By simulating the shear process of the structure under different lifting forces, it is concluded that the magnitude of the lifting force determines the final dynamic response of the structure. In the simulation part of the unloading process, the influence of different unloading velocity on the dynamic response of the structure during the unloading process is analyzed, and the relationship between the final state of the structure and the unloading velocity after the completion of the unloading is obtained. This paper also compares the construction simulation results with the actual monitoring results, and compares the simulation results of the column cutting process and the unloading process with the actual engineering monitoring data. In this paper, the monitoring data of Apple flagship store support beam pumping project in Yitian Holiday Square, Nanshan District, Shenzhen City are used, and the results of construction simulation calculation in this paper are compared on the trend, which proves the rationality and correctness of the simulation method in this paper.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU746.3

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