新型可更换耗能连梁设计方法研究
发布时间：2018-12-05 19:01
【摘要】：本文首先阐述了可恢复功能结构这一概念,并说明了增强连梁的耗能性能以及提高连梁的可修复性的迫切和意义。通过对现有耗能连梁以及可更换耗能连梁的总结,提出了新型可更换耗能连梁设计方法。为了深入了解由新型设计方法设计的可更换耗能连梁结构的结构特性并评估新型可更换耗能连梁设计方法的可行性进行了相关研究,主要内容如下:(1)通过对现有设计方法的分析总结,提出一种基于等效刚度的可更换耗能连梁设计方法,即利用钢板连接件与阻尼器同时调节可更换耗能连梁刚度,并使其与原连梁刚度等效,从而达到设计方法简单实用的目的,同时保证可更换耗能连梁具有良好的耗能能力。(2)提出新型可更换耗能连梁端部构造,使剪力墙边缘约束构件的箍筋能顺利穿过钢板,以便于施工安装。并通过有限元分析初步验证了端部开缝构造形式的钢板连接件的可行性。(3)根据新型可更换耗能连梁设计方法,设计了一片三层均装设可更换耗能连梁的对称双肢剪力墙,并采用ABAQUS通用有限元软件对其进行推覆分析从而得出结构性能特点,同时验证并评估了前文所述新型可更换耗能连梁设计方法的可行性。结果表明:新型可更换耗能连梁的钢筋并未屈服,且阻尼器先于墙肢屈服,新型可更换耗能连梁设计方法不仅有效的保护了连梁,形成了理想的破坏模式,而且阻尼器耗能利用率较高。(4)以某一实际工程中的纯剪力墙结构为例,首先对原结构分别进行多遇地震弹性动力时程分析以及罕遇地震作用下的弹塑性动力时程分析,从而得出原结构的不足,接着针对原结构存在的问题应用前文所述的可更换耗能连梁设计流程对结构进行设计,并进行多遇地震弹性动力时程分析以及罕遇地震作用下的弹塑性动力时程分析,以比较安装可更换耗能连梁前后结构在响应、破坏模式、构件损伤、耗能模式等方面的差异性,进一步评估前文所述的设计理论。结果表明:初步实现了新型可更换耗能连梁在实际工程中的应用,新型可更换耗能连梁起到了保护剪力墙的作用,改善了结构的耗能模式,提高了结构的抗震性能。
[Abstract]:In this paper, the concept of recoverable functional structure is first expounded, and the urgency and significance of enhancing the energy dissipation performance of connected beams and improving the repairability of connected beams are explained. Based on the summary of the existing energy dissipation connecting beam and the replaceable energy dissipation connecting beam, a new design method of the replacement energy dissipation connecting beam is put forward. In order to deeply understand the structural characteristics of the replaceable energy dissipation beam structure designed by the new design method and evaluate the feasibility of the new replacement energy dissipation connecting beam design method, the relevant research is carried out. The main contents are as follows: (1) based on the analysis and summary of the existing design methods, a design method of replaceable energy dissipation connecting beam based on equivalent stiffness is proposed, which is to adjust the stiffness of the replaceable energy dissipation connecting beam by using the steel plate connector and the damper simultaneously. The stiffness of the beam is equivalent to that of the original beam, so that the design method is simple and practical, and at the same time, the good energy dissipation capacity of the replaceable energy dissipation connecting beam is guaranteed. (2) A new type of exchangeable energy dissipation connecting beam end structure is proposed. The stirrups of the shear wall edge restrained members can pass through the steel plate smoothly, so as to facilitate construction and installation. Through finite element analysis, the feasibility of steel plate connectors with end joint structure is preliminarily verified. (3) according to the new design method of exchangeable energy dissipation connecting beam, a symmetrical two-limb shear wall with three layers with replaceable energy dissipation connection beam is designed. The structure performance characteristics are obtained by using the ABAQUS universal finite element software, and the feasibility of the new design method of the replacement energy dissipation connecting beam mentioned above is verified and evaluated at the same time. The results show that the steel bar of the new replaceable energy dissipation connecting beam does not yield, and the damper yields before the wall limb. The new design method of the new replacement energy dissipation connecting beam not only effectively protects the connected beam, but also forms the ideal failure mode. Moreover, the energy dissipation efficiency of dampers is high. (4) taking the pure shear wall structure in a practical project as an example, the elastic dynamic time history analysis of the original structure and the elastic-plastic dynamic history analysis of the original structure under rare earthquake are carried out respectively. In order to get the deficiency of the original structure, and then to solve the problems of the original structure, the design process of the replaceable energy dissipation connecting beam is used to design the structure. In order to compare the difference of the structure before and after installing the replacement energy dissipation beam in response, failure mode, component damage, energy dissipation mode and so on, the elastic dynamic time history analysis of frequent earthquake and the elastoplastic dynamic time history analysis under rare earthquake action are carried out in order to compare the difference of the structure before and after installing the replacement energy dissipation beam. Further evaluate the design theory described above. The results show that the application of the new replaceable energy dissipation connecting beam in practical engineering is realized preliminarily. The new replacement energy dissipation connecting beam plays the role of protecting the shear wall, improving the energy dissipation mode of the structure and improving the seismic performance of the structure.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU973.16
本文编号：2365313
[Abstract]:In this paper, the concept of recoverable functional structure is first expounded, and the urgency and significance of enhancing the energy dissipation performance of connected beams and improving the repairability of connected beams are explained. Based on the summary of the existing energy dissipation connecting beam and the replaceable energy dissipation connecting beam, a new design method of the replacement energy dissipation connecting beam is put forward. In order to deeply understand the structural characteristics of the replaceable energy dissipation beam structure designed by the new design method and evaluate the feasibility of the new replacement energy dissipation connecting beam design method, the relevant research is carried out. The main contents are as follows: (1) based on the analysis and summary of the existing design methods, a design method of replaceable energy dissipation connecting beam based on equivalent stiffness is proposed, which is to adjust the stiffness of the replaceable energy dissipation connecting beam by using the steel plate connector and the damper simultaneously. The stiffness of the beam is equivalent to that of the original beam, so that the design method is simple and practical, and at the same time, the good energy dissipation capacity of the replaceable energy dissipation connecting beam is guaranteed. (2) A new type of exchangeable energy dissipation connecting beam end structure is proposed. The stirrups of the shear wall edge restrained members can pass through the steel plate smoothly, so as to facilitate construction and installation. Through finite element analysis, the feasibility of steel plate connectors with end joint structure is preliminarily verified. (3) according to the new design method of exchangeable energy dissipation connecting beam, a symmetrical two-limb shear wall with three layers with replaceable energy dissipation connection beam is designed. The structure performance characteristics are obtained by using the ABAQUS universal finite element software, and the feasibility of the new design method of the replacement energy dissipation connecting beam mentioned above is verified and evaluated at the same time. The results show that the steel bar of the new replaceable energy dissipation connecting beam does not yield, and the damper yields before the wall limb. The new design method of the new replacement energy dissipation connecting beam not only effectively protects the connected beam, but also forms the ideal failure mode. Moreover, the energy dissipation efficiency of dampers is high. (4) taking the pure shear wall structure in a practical project as an example, the elastic dynamic time history analysis of the original structure and the elastic-plastic dynamic history analysis of the original structure under rare earthquake are carried out respectively. In order to get the deficiency of the original structure, and then to solve the problems of the original structure, the design process of the replaceable energy dissipation connecting beam is used to design the structure. In order to compare the difference of the structure before and after installing the replacement energy dissipation beam in response, failure mode, component damage, energy dissipation mode and so on, the elastic dynamic time history analysis of frequent earthquake and the elastoplastic dynamic time history analysis under rare earthquake action are carried out in order to compare the difference of the structure before and after installing the replacement energy dissipation beam. Further evaluate the design theory described above. The results show that the application of the new replaceable energy dissipation connecting beam in practical engineering is realized preliminarily. The new replacement energy dissipation connecting beam plays the role of protecting the shear wall, improving the energy dissipation mode of the structure and improving the seismic performance of the structure.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU973.16
【参考文献】
相关期刊论文 前2条
1 周丽丽;毛晨曦;;形状记忆合金阻尼器在结构减振中的应用[J];低温建筑技术;2009年12期
2 潘超;翁大根;;连梁内设置竖向变形阻尼器的耗能剪力墙体系减震分析与设计[J];建筑结构学报;2012年10期
，本文编号：2365313
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