基于模块化装配式混凝土结构关键节点连接技术研究与应用

发布时间：2018-03-02 08:31

本文关键词： 装配式混凝土结构梁-柱节点柱-柱节点钢筋套筒灌浆连接钢筋浆锚搭接连接优化设计接头型式检验　出处：《安徽理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着现代住宅产业化不断发展,装配式混凝土结构采用了构件工厂预制和现场装配相结合的方法,达到了保证质量和缩短工期的目的。装配式混凝土结构建筑在生产效率有了明显的提高,同时节约能源和资源,体现绿色环保的理念。装配式混凝土结构关键节点处的连接是关键问题,这将对装配式混凝土结构的安全性有着重大的影响。目前国内装配式混凝土结构在节点处所采用的钢筋连接方式主要有钢筋套筒灌浆连接和钢筋浆锚搭接连接两种,分别对这两种连接方式在连接构造、基本原理、破坏模式和施工技术要点进行说明。当前装配式混凝土结构设计计算采用了等同现浇或基本等同现浇的设计计算方法,而实际上装配式混凝土结构与现浇混凝土结构并不完全相同,因此完全采用现浇混凝土结构的计算体系和方法并不合理。通过比较装配式混凝土结构与现浇混凝土结构的差异,探寻装配式混凝土结构连接节点的计算体系和方法。并对梁-柱节点和柱-柱节点连接做如下处理:(1)对梁-柱节点钢筋的连接方式由搭接改为套筒灌浆连接,混凝土由现浇改为灌浆,原来梁-柱节点的刚性连接改为了套筒灌浆连;(2)对预制柱进行分段,各段柱-柱钢筋的连接方式采用套筒灌浆连接,混凝土由现浇改为灌浆,预制柱之间同样采用套筒灌浆连接。通过利用等强连接进行结构优化方案设计。在具体应用种采用钢筋套筒灌浆连接技术分别对梁-柱节点和柱-柱节点进行优化设计,并做出效果评价得出采用钢筋套筒灌浆连接的节点在性能上优于采用混凝土现浇连接的节点,分别对钢筋套筒灌浆连接接头进行偏置单向拉伸试验、对中单向拉伸试验、高应力反复拉压试验和大变形反复拉压试验,试验结果表明:连接钢筋断裂先于套筒被拉断和灌浆料被拔出,进一步验证梁-柱节点和柱-柱节点采用钢筋套筒灌浆连接的合理性和安全性。钢筋套筒灌浆连接技术在关键节点上的应用对装配式混凝土结构的发展具有较为广泛的前景。
[Abstract]:With the continuous development of the industrialization of modern housing, the prefabricated concrete structure adopts the method of combining the prefabrication of the component factory with the on-site assembly. In order to ensure the quality and shorten the construction period, the production efficiency of the prefabricated concrete structure building has been improved obviously, and energy and resources have been saved at the same time. The key problem is the connection of the key joints of the assembled concrete structure. This will have a great impact on the safety of the assembled concrete structure. At present, there are two kinds of reinforced concrete structures in China, which are reinforced sleeve grouting connection and reinforced mortar anchor lapping connection. The connection structure, the basic principle, the failure mode and the key points of construction technology are explained respectively. At present, the design and calculation methods of equivalent cast-in-place or basic equivalent cast-in-place are used in the design and calculation of the assembled concrete structure. In fact, the prefabricated concrete structure is not exactly the same as the cast-in-place concrete structure, so the calculation system and method of adopting the cast-in-place concrete structure completely is not reasonable. By comparing the difference between the prefabricated concrete structure and the cast-in-place concrete structure, This paper explores the calculation system and method of the connection joints of prefabricated concrete structures. The connection between beam-column joints and column-column joints is treated as follows: 1) the connection mode of beam-column joints is changed from lap connection to sleeve grouting connection. The concrete is changed from cast-in-situ to grouting, and the rigid connection of beam-column joint is changed to sleeve grouting to link the precast column. The connecting mode of steel bar between column and column is connected with sleeve grouting, and the concrete is changed from cast-in-place to grouting. The sleeve grouting connection is also used between the prefabricated columns. The structural optimization scheme is designed by using the equal strength connection. In the concrete application, the beam-column joints and the column-column joints are designed optimally by using the reinforced sleeve grouting connection technology, respectively. The results show that the performance of the joints with reinforced sleeve grouting connections is better than that with concrete cast-in-place joints. The eccentric uniaxial tensile tests and the middle uniaxial tensile tests are carried out on the joints of reinforced sleeve grouting connections respectively. The high stress repeated tensile compression test and the large deformation repeated tension compression test show that the connecting steel bar breaks before the sleeve is pulled and the grouting material is pulled out. The rationality and safety of reinforced sleeve grouting connection for beam-column and column-column joints are further verified. The application of reinforced sleeve grouting in key joints has a broad prospect for the development of prefabricated concrete structures.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU758.12

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