【摘要】：自復位搖擺結構利用預應力拉索或鋼絞線來提供結構自復位荷載，搖擺構件控制結構的側向變形模式，通過消能減震裝置來增加結構的耗能能力。經過合理的設計，此類結構不但能減小結構的地震響應，而且能使損傷集中于專門的耗能構件中，結構主體損傷很小，殘余變形可以得到顯著的控制。具有明確的損傷機制的同時，，還能夠根據(jù)實際需要控制結構殘余變形,從而增加了強震后結構功能可恢復能力。本文從構件層次與結構層次，對提出的預應力搖擺柱、底部開縫自復位搖擺墻構件與自復位搖擺結構體系的抗震性能進行研究與分析，并在大量數(shù)值統(tǒng)計分析的基礎上提出定量的殘余變形計算方法，為后續(xù)自復位搖擺墻結構設計提供理論依據(jù)。 主要研究工作和成果如下： （1）通過進行現(xiàn)澆柱和裝配柱的低周往復試驗，對比研究了其滯回性能特性。其次通過對比驗證試驗模型，利用OPENSEES建立精細的預應力搖擺柱模型，并進行數(shù)值分析，通過研究其滯回性能特征，分析構件的殘余變形規(guī)律。結果表明通過增加無粘結后張預應力筋可有效減小結構的殘余變形。 （2）提出了底部開縫后張預應力搖擺墻結構，基于通用有限元程序ABAQUS對其受力特征及抗震性能進行了詳細的分析。結果表明，利用底部縫隙的張開與合攏減小了墻體的開裂與損傷，設置無粘結后張拉預應力為結構提供了較好的恢復力，從而保證其自復位能力，而普通非預應力筋具有一定的耗能能力。 （3）利用有限元程序OPENSEES對不同高度的自復位搖擺墻結構，進行了中震和大震集合下的地震時程反應分析。從整體結構層次上研究了自復搖擺墻結構的地震反應規(guī)律與抗震性能。 （4）統(tǒng)計研究了自復位搖擺墻結構殘余變形規(guī)律，并建立了相應的殘余變形計算方法，最后通過算例，驗證了殘余變形計算方法用于自復位搖擺墻結構殘余變形分析與計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.
【學位授予單位】：北京工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU352.11;TU375

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本文編號：2151933