既有砖混结构抗震加固优化及其效果评价

发布时间：2018-03-03 14:46

本文选题：既有砖混结构　切入点：抗震　出处：《中国石油大学（华东）》2013年硕士论文　论文类型：学位论文

【摘要】：砖混结构是主要的几种房屋结构形式之一，在中国广大的非一线城市、城镇和农村大量存在。由于大量的既有砖混结构建筑物抗震安全性不足且已经进入维修加固期，加上由于经济、工期、效益和环保等方面的要求，抗震鉴定、加固和改造的需求很大。如何低成本地对既有砖混结构进行抗震加固，确保其安全和可靠，，是个急需研究的课题。本文是在他人的研究基础上，从检测结果分析和病害总结、基于PKPM的加固设计方案优化及评价、基于ANSYS的混合体系地震动力学分析和抗震性能评价，以及砖混结构抗倒塌性能评价等几个方面进行了研究。在前期工作中，在做好现状总结和典型结构分析对象选择的基础上，做好检测鉴定和病害总结工作，对分析对象---某砖混结构医院进行了仔细的检测和鉴定，对加固重点进行了优化。在主体工作中，首先利用国家认证和推广的结构设计和鉴定加固软件PKPM（2010版）中的砌体加固模块进行验算，进行了病房楼的出屋面不规则楼电梯间的加固设计方案优化和加固后结构性能评估和经济性评价；连体砖混结构（体检楼）断开前后不同加固处理方法的抗震安全性评价，以及断开前后该体检楼墙段的抗震性能评价。其次研究砖混结构的ANSYS数值模拟方法，利用ANSYS软件建立混合体系砖混结构模型，对一个顶层是框架的砖混结构ANSYS三维模型进行时程分析，计算该混合体系建筑在地震动力作用下的响应，评价了其抗震性能。在比较和评价的同时对砖混结构的抗震性能做了机理分析。最后根据鲁棒性理论提出一种可用于加固后砖混结构抗倒塌性能方面的评价方案。
[Abstract]:Brick-concrete structure is one of the main forms of building structure, which exists in a large number of non-first-tier cities, towns and rural areas in China. Because a large number of existing brick-concrete structure buildings are not safe enough in earthquake resistance and have entered the period of maintenance and reinforcement, Due to the requirements of economy, time limit, benefit and environmental protection, there is a great demand for seismic identification, reinforcement and reconstruction. How to strengthen existing brick and concrete structures at low cost to ensure their safety and reliability is an urgent research subject. On the basis of others' research, this paper analyzes the detection results, summarizes the disease, optimizes and evaluates the reinforcement design scheme based on PKPM, and analyses the seismic dynamics and seismic performance of hybrid system based on ANSYS. And several aspects such as the evaluation of brick-concrete structure anti-collapse performance were studied. In the earlier work, on the basis of the summary of the present situation and the selection of the typical structural analysis object, the detection and identification and the disease summary were done, and the analysis object---a brick and concrete structure hospital was carefully examined and identified. The emphasis of reinforcement is optimized. In the main work, first of all, the masonry reinforcement module in the national certified and popularized structural design and appraisal software PKPM(2010 version is used for checking calculation. Optimization of reinforcement design scheme, evaluation of structural performance and economic evaluation after reinforcement, seismic safety evaluation of different reinforcement methods before and after disconnection of contiguous brick and concrete structure (physical building) are carried out. Secondly, the ANSYS numerical simulation method of brick and concrete structure is studied, and the model of brick concrete structure with hybrid system is established by using ANSYS software. The ANSYS 3D model of a brick-and-concrete structure with the top floor is analyzed by time history analysis, and the response of the hybrid system under seismic dynamic action is calculated. The aseismic performance of brick concrete structure is evaluated, and the mechanism analysis of the seismic performance of brick-concrete structure is also made at the same time of comparison and evaluation. Finally, based on the robustness theory, a scheme is proposed to evaluate the collapse resistance of reinforced brick and concrete structures.
【学位授予单位】：中国石油大学（华东）
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU398.5;TU746.3

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