【摘要】：自復(fù)位搖擺結(jié)構(gòu)利用預(yù)應(yīng)力拉索或鋼絞線來(lái)提供結(jié)構(gòu)自復(fù)位荷載，搖擺構(gòu)件控制結(jié)構(gòu)的側(cè)向變形模式，通過(guò)消能減震裝置來(lái)增加結(jié)構(gòu)的耗能能力。經(jīng)過(guò)合理的設(shè)計(jì)，此類結(jié)構(gòu)不但能減小結(jié)構(gòu)的地震響應(yīng)，而且能使損傷集中于專門(mén)的耗能構(gòu)件中，結(jié)構(gòu)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(jī)制的同時(shí)，，還能夠根據(jù)實(shí)際需要控制結(jié)構(gòu)殘余變形,從而增加了強(qiáng)震后結(jié)構(gòu)功能可恢復(fù)能力。本文從構(gòu)件層次與結(jié)構(gòu)層次，對(duì)提出的預(yù)應(yīng)力搖擺柱、底部開(kāi)縫自復(fù)位搖擺墻構(gòu)件與自復(fù)位搖擺結(jié)構(gòu)體系的抗震性能進(jìn)行研究與分析，并在大量數(shù)值統(tǒng)計(jì)分析的基礎(chǔ)上提出定量的殘余變形計(jì)算方法，為后續(xù)自復(fù)位搖擺墻結(jié)構(gòu)設(shè)計(jì)提供理論依據(jù)。 主要研究工作和成果如下： （1）通過(guò)進(jìn)行現(xiàn)澆柱和裝配柱的低周往復(fù)試驗(yàn)，對(duì)比研究了其滯回性能特性。其次通過(guò)對(duì)比驗(yàn)證試驗(yàn)?zāi)Ｐ�，利用OPENSEES建立精細(xì)的預(yù)應(yīng)力搖擺柱模型，并進(jìn)行數(shù)值分析，通過(guò)研究其滯回性能特征，分析構(gòu)件的殘余變形規(guī)律。結(jié)果表明通過(guò)增加無(wú)粘結(jié)后張預(yù)應(yīng)力筋可有效減小結(jié)構(gòu)的殘余變形。 （2）提出了底部開(kāi)縫后張預(yù)應(yīng)力搖擺墻結(jié)構(gòu)，基于通用有限元程序ABAQUS對(duì)其受力特征及抗震性能進(jìn)行了詳細(xì)的分析。結(jié)果表明，利用底部縫隙的張開(kāi)與合攏減小了墻體的開(kāi)裂與損傷，設(shè)置無(wú)粘結(jié)后張拉預(yù)應(yīng)力為結(jié)構(gòu)提供了較好的恢復(fù)力，從而保證其自復(fù)位能力，而普通非預(yù)應(yīng)力筋具有一定的耗能能力。 （3）利用有限元程序OPENSEES對(duì)不同高度的自復(fù)位搖擺墻結(jié)構(gòu)，進(jìn)行了中震和大震集合下的地震時(shí)程反應(yīng)分析。從整體結(jié)構(gòu)層次上研究了自復(fù)搖擺墻結(jié)構(gòu)的地震反應(yīng)規(guī)律與抗震性能。 （4）統(tǒng)計(jì)研究了自復(fù)位搖擺墻結(jié)構(gòu)殘余變形規(guī)律，并建立了相應(yīng)的殘余變形計(jì)算方法，最后通過(guò)算例，驗(yàn)證了殘余變形計(jì)算方法用于自復(fù)位搖擺墻結(jié)構(gòu)殘余變形分析與計(jì)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(xué)位授予單位】：北京工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU352.11;TU375

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本文編號(hào)：2151933