【摘要】：消能減震結(jié)構(gòu)是近年來各國(guó)都在研究的地震領(lǐng)域的一項(xiàng)新技術(shù)，消能減震結(jié)構(gòu)是通過附加在結(jié)構(gòu)上的消能裝置來消耗水平地震作用或風(fēng)作用下輸入給結(jié)構(gòu)的能量，從而達(dá)到抗震目的�；谛阅艿目拐鹪O(shè)計(jì)是指結(jié)構(gòu)所產(chǎn)生的最大變形不超過事先設(shè)定好的一個(gè)范圍（即性能目標(biāo)），通過合理的性能目標(biāo)的選定，使得建筑結(jié)構(gòu)的造價(jià)費(fèi)用更為合理。結(jié)合消能裝置，將其應(yīng)用到基于性能的抗震設(shè)計(jì)理念中來，本文將二者結(jié)合，并且針平面對(duì)不對(duì)稱結(jié)構(gòu)，進(jìn)行了以下研究工作。 對(duì)于粘滯阻尼器的力學(xué)特性進(jìn)行了簡(jiǎn)單的介紹，給出了粘滯阻尼器的各種力學(xué)模型，比較了非線性粘滯阻尼器和線性粘滯阻尼器的性能，介紹了非線性阻尼器的等效線性化原理。推導(dǎo)了線性粘滯阻尼器和非線性粘滯阻尼器的附加阻尼比計(jì)算公式。并對(duì)其他常見阻尼器進(jìn)行簡(jiǎn)單介紹。 研究了附加非線性粘滯阻尼器平面不對(duì)稱結(jié)構(gòu)基于性能的抗震設(shè)計(jì)方法，介紹了平面對(duì)稱結(jié)構(gòu)直接基于位移的抗震設(shè)計(jì)方法。將結(jié)構(gòu)多自由度體系等效成為單自由度體系，然后由位移反應(yīng)譜計(jì)算出單自由度體系在特定地震作用下，滿足性能目標(biāo)的總阻尼比，認(rèn)為該阻尼比就是原結(jié)構(gòu)所需的總阻尼比，從而計(jì)算出阻尼器所需提供的阻尼比，最后進(jìn)行阻尼器設(shè)計(jì)。針對(duì)平面不對(duì)稱結(jié)構(gòu)，使用能力譜法，建立需求曲線與能力曲線，通過交點(diǎn)與目標(biāo)位移的比較，計(jì)算出了結(jié)構(gòu)滿足性能目標(biāo)的附加阻尼比。介紹了結(jié)構(gòu)在兩個(gè)方向上的阻尼系數(shù)的分配方式，，通過兩條實(shí)際地震波和一條人工波對(duì)消能結(jié)構(gòu)進(jìn)行時(shí)程分析，用于驗(yàn)證能力譜法對(duì)于平面不對(duì)稱結(jié)構(gòu)的有效性。 探索了附加粘滯阻尼器結(jié)構(gòu)的位移響應(yīng)計(jì)算方法，首先假定結(jié)構(gòu)頂點(diǎn)位移，算出附加非線性阻尼器結(jié)構(gòu)的總阻尼比，建立能力譜曲線與需求譜曲線，比較二者交點(diǎn)與假定的頂點(diǎn)位移的關(guān)系，若比較結(jié)果不接近，則重新假定結(jié)構(gòu)頂點(diǎn)位移，進(jìn)行反復(fù)迭代失算，直到假定的頂點(diǎn)位移與能力譜曲線和需求譜曲線的交點(diǎn)的位移接近為止。用此方法，計(jì)算多個(gè)模態(tài)下結(jié)構(gòu)的頂點(diǎn)位移，最后通過CQC組合得出結(jié)構(gòu)頂點(diǎn)的最終位移。并用三條地震波對(duì)效能結(jié)構(gòu)進(jìn)行時(shí)程分析，已驗(yàn)證該方法的有效性。
[Abstract]:The energy dissipation structure is a new technique in the field of earthquake which has been studied by many countries in recent years. The energy dissipation structure consumes the energy input to the structure by means of the energy dissipation device attached to the structure under the action of horizontal earthquake or wind. In order to achieve the purpose of earthquake resistance. Performance-based seismic design means that the maximum deformation produced by the structure does not exceed a predefined range (i.e., the performance target). Through the selection of reasonable performance objectives, the cost of the building structure is more reasonable. Combined with the energy dissipation device, it is applied to the performance-based seismic design concept. In this paper, the two methods are combined, and the asymmetric structure is studied in the needle plane. In this paper, the mechanical properties of viscous dampers are briefly introduced. Various mechanical models of viscous dampers are given, and the performances of nonlinear viscous dampers and linear viscous dampers are compared. The principle of equivalent linearization of nonlinear dampers is introduced. The formulas for calculating the additional damping ratio of linear viscous dampers and nonlinear viscous dampers are derived. The other dampers are introduced briefly. The performance-based seismic design method for planar asymmetric structures with nonlinear viscous dampers is studied. The displacement-based seismic design method for planar symmetric structures is introduced. The multi-degree-of-freedom system of a structure is equivalent to a single-degree-of-freedom system. Then the total damping ratio of the single-degree-of-freedom system under specific earthquake action is calculated by displacement response spectrum. It is considered that the damping ratio is the total damping ratio required by the original structure. The damping ratio of the damper is calculated and the damper is designed. According to the plane asymmetric structure, the capacity spectrum method is used to establish the demand curve and the capability curve. By comparing the intersection point with the target displacement, the additional damping ratio of the structure satisfying the performance objective is calculated. In this paper, the distribution of damping coefficient in two directions is introduced. Through the time-history analysis of two actual seismic waves and one artificial wave, the effectiveness of the capability spectrum method for plane asymmetrical structures is verified. In this paper, the method of calculating the displacement response of the structure with viscous dampers is explored. Firstly, the peak displacement of the structure is assumed, the total damping ratio of the structure with nonlinear dampers is calculated, and the capacity spectrum curve and the demand spectrum curve are established. The relationship between the intersection of the two points and the assumed vertex displacement is compared. If the comparison results are not close, then the structural vertex displacement is re-assumed and repeated iterative miscalculation is carried out. Until the assumed vertex displacement is close to the displacement at the intersection of the capacity spectrum curve and the demand spectrum curve. Using this method, the vertex displacement of the structure under multiple modes is calculated, and the final displacement of the structure vertex is obtained by CQC combination. The effectiveness of the method is verified by time history analysis of three seismic waves.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU352.11

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