吉林市全民健身中心工程技术问题研究

发布时间：2018-12-26 10:55

【摘要】：国内外的工程建设项目发展情况表明,当建筑结构技术发展到一定的阶段以后,对既有结构的改造加固和修复将成为主要的结构建设方式。目前国内改造加固工程中,由于对拟加固结构的分析不够全面、设计人员技术水平参差不齐、施工质量要求较高等因素,导致国内的改造加固工程中存在很多问题,这些情况都制约了我国改造加固技术的发展。本文结合吉林市全民健身中心体育馆的改造加固工程,建立了拟加固工程的计算模型,从整体上对拟加固结构进行了MIDAS分析,处理了新建结构体系与原结构体系的连接及新旧混凝土接合面的粘结,得到了结构的加固方案,同时对结构的耐久性进行了修复处理。本文主要是分对下四个方面进行了研究： 1、了解整体结构,确定上部屋盖结构的结构形式为双层空间网壳结构,建立结构整体模型。然后对模型进行整体分析包括静力分析、时程分析等,结构整体性能良好。 2、依据现有的新旧混凝土的连接技术,处理好了拟建工程中新建混凝土部分与原混凝土的连接问题,相交界面凿毛、刷界面剂,并且在节点处加腋、加筋,以此来提高抗剪承载力。 3、整体分析结果表明：结构的部分框架梁的承载力不能满足设计要求。根据整体分析结果确定结构下部混凝土的承载力加固的措施,拟采用增大截面加固法或外粘型钢加固法对框架梁进行加固。 4、针对结构中出现的梁板裂缝、钢筋锈蚀、看台混凝土表面酥松等耐久性问题对结构下部混凝土进行耐久性修复,保障结构的耐久性。
[Abstract]:The development of engineering construction projects at home and abroad shows that when the technology of building structure develops to a certain stage, the reconstruction, reinforcement and restoration of existing structures will become the main way of structural construction. At present, there are many problems in the domestic retrofit and reinforcement projects due to the lack of comprehensive analysis of the structures to be strengthened, the uneven technical level of the designers, and the high construction quality requirements. These conditions have restricted the development of retrofit and reinforcement technology in China. In this paper, combined with the reconstruction and reinforcement project of Jilin City National Fitness Center Stadium, the calculation model of the proposed reinforcement project is established, and the MIDAS analysis of the proposed reinforcement structure is carried out as a whole. The connection between the new structure system and the original structure system and the bond between the new and old concrete joints are treated, and the reinforcement scheme is obtained. Meanwhile, the durability of the structure is repaired. In this paper, the following four aspects are studied: 1. To understand the whole structure, determine the structure form of the upper roof structure as the double layer space reticulated shell structure, and set up the whole structure model. Then the whole analysis of the model including static analysis, time history analysis, the overall performance of the structure is good. 2. According to the existing connection technology of new and old concrete, the problem of connection between the new concrete part and the original concrete in the proposed project has been dealt with, intersecting the interface with haircut, brushing interface agent, and adding axil and reinforcement at the joint, In order to improve the shear capacity. 3. The overall analysis results show that the bearing capacity of some frame beams of the structure can not meet the design requirements. According to the results of the whole analysis, the measures of strengthening the bearing capacity of the concrete in the lower part of the structure are determined, and the reinforcement method of increasing cross section or external adhesion steel is proposed to strengthen the frame beam. 4. Aiming at the durability problems such as beam-slab cracks, steel bar corrosion, bleachers concrete surface shortness and so on, the durability restoration of the lower part of the structure concrete is carried out to ensure the durability of the structure.
【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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