自复位摇摆结构抗震性能与残余变形计算方法
发布时间：2018-07-29 07:21
【摘要】：自复位摇摆结构利用预应力拉索或钢绞线来提供结构自复位荷载，摇摆构件控制结构的侧向变形模式，通过消能减震装置来增加结构的耗能能力。经过合理的设计，此类结构不但能减小结构的地震响应，而且能使损伤集中于专门的耗能构件中，结构主体损伤很小，残余变形可以得到显著的控制。具有明确的损伤机制的同时，，还能够根据实际需要控制结构残余变形,从而增加了强震后结构功能可恢复能力。本文从构件层次与结构层次，对提出的预应力摇摆柱、底部开缝自复位摇摆墙构件与自复位摇摆结构体系的抗震性能进行研究与分析，并在大量数值统计分析的基础上提出定量的残余变形计算方法，为后续自复位摇摆墙结构设计提供理论依据。 主要研究工作和成果如下： （1）通过进行现浇柱和装配柱的低周往复试验，对比研究了其滞回性能特性。其次通过对比验证试验模型，利用OPENSEES建立精细的预应力摇摆柱模型，并进行数值分析，通过研究其滞回性能特征，分析构件的残余变形规律。结果表明通过增加无粘结后张预应力筋可有效减小结构的残余变形。 （2）提出了底部开缝后张预应力摇摆墙结构，基于通用有限元程序ABAQUS对其受力特征及抗震性能进行了详细的分析。结果表明，利用底部缝隙的张开与合拢减小了墙体的开裂与损伤，设置无粘结后张拉预应力为结构提供了较好的恢复力，从而保证其自复位能力，而普通非预应力筋具有一定的耗能能力。 （3）利用有限元程序OPENSEES对不同高度的自复位摇摆墙结构，进行了中震和大震集合下的地震时程反应分析。从整体结构层次上研究了自复摇摆墙结构的地震反应规律与抗震性能。 （4）统计研究了自复位摇摆墙结构残余变形规律，并建立了相应的残余变形计算方法，最后通过算例，验证了残余变形计算方法用于自复位摇摆墙结构残余变形分析与计算的合理性和可行性。
[Abstract]:Self-reset rocking structures use prestressed cables or steel strands to provide self-reset loads, rocking members control the lateral deformation mode of structures, and energy dissipation devices are used to increase the energy dissipation capacity of the structures. After reasonable design, this kind of structure can not only reduce the seismic response of the structure, but also make the damage concentrate on the special energy dissipation member. The damage of the main body of the structure is very small, and the residual deformation can be controlled significantly. At the same time, the residual deformation of the structure can be controlled according to the actual needs, thus increasing the functional recoverability of the structure after strong earthquake. In this paper, the seismic behavior of the prestressed rocking column, the bottom slit self-reset rocking wall member and the self-reset rocking structure system are studied and analyzed from the member level and the structure level. On the basis of a large number of numerical statistical analysis, a quantitative method for calculating residual deformation is proposed, which provides a theoretical basis for the subsequent design of rocking wall structures with self-reposition. The main work and results are as follows: (1) the hysteretic properties of cast-in-situ column and assembled column are studied by low-cycle reciprocating test. Secondly, the fine prestressed rocking column model is established by using OPENSEES by comparing the test model, and numerical analysis is carried out, and the residual deformation law of the members is analyzed by studying the hysteretic characteristics of the model. The results show that the residual deformation of the structure can be effectively reduced by adding unbonded post-tensioned prestressed tendons. Based on the general finite element program ABAQUS, the stress characteristics and seismic performance of the finite element program are analyzed in detail. The results show that the crack and damage of the wall can be reduced by the opening and closing of the bottom crevice, and the unbonded post-tensioning prestress can provide a good restoring force for the structure, thus ensuring the self-reposition ability of the wall. The ordinary non-prestressed tendons have a certain energy dissipation capacity. (3) the seismic time-history response analysis of self-reset rocking wall structures with different heights is carried out by using the finite element program OPENSEES. The seismic response law and seismic performance of self-composite rocking wall structure are studied from the whole structure level. (4) the residual deformation law of self-reset rocking wall structure is studied statistically, and the corresponding residual deformation calculation method is established. Finally, the rationality and feasibility of the residual deformation analysis and calculation of self-reset rocking wall structures are verified by an example.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU352.11;TU375
本文编号：2151933
[Abstract]:Self-reset rocking structures use prestressed cables or steel strands to provide self-reset loads, rocking members control the lateral deformation mode of structures, and energy dissipation devices are used to increase the energy dissipation capacity of the structures. After reasonable design, this kind of structure can not only reduce the seismic response of the structure, but also make the damage concentrate on the special energy dissipation member. The damage of the main body of the structure is very small, and the residual deformation can be controlled significantly. At the same time, the residual deformation of the structure can be controlled according to the actual needs, thus increasing the functional recoverability of the structure after strong earthquake. In this paper, the seismic behavior of the prestressed rocking column, the bottom slit self-reset rocking wall member and the self-reset rocking structure system are studied and analyzed from the member level and the structure level. On the basis of a large number of numerical statistical analysis, a quantitative method for calculating residual deformation is proposed, which provides a theoretical basis for the subsequent design of rocking wall structures with self-reposition. The main work and results are as follows: (1) the hysteretic properties of cast-in-situ column and assembled column are studied by low-cycle reciprocating test. Secondly, the fine prestressed rocking column model is established by using OPENSEES by comparing the test model, and numerical analysis is carried out, and the residual deformation law of the members is analyzed by studying the hysteretic characteristics of the model. The results show that the residual deformation of the structure can be effectively reduced by adding unbonded post-tensioned prestressed tendons. Based on the general finite element program ABAQUS, the stress characteristics and seismic performance of the finite element program are analyzed in detail. The results show that the crack and damage of the wall can be reduced by the opening and closing of the bottom crevice, and the unbonded post-tensioning prestress can provide a good restoring force for the structure, thus ensuring the self-reposition ability of the wall. The ordinary non-prestressed tendons have a certain energy dissipation capacity. (3) the seismic time-history response analysis of self-reset rocking wall structures with different heights is carried out by using the finite element program OPENSEES. The seismic response law and seismic performance of self-composite rocking wall structure are studied from the whole structure level. (4) the residual deformation law of self-reset rocking wall structure is studied statistically, and the corresponding residual deformation calculation method is established. Finally, the rationality and feasibility of the residual deformation analysis and calculation of self-reset rocking wall structures are verified by an example.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU352.11;TU375
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本文编号：2151933
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