本文選題：平扭耦聯(lián) + 鉛芯橡膠隔震支座��； 參考：《東南大學(xué)》2016年碩士論文

【摘要】：隨著不規(guī)則結(jié)構(gòu)和相鄰結(jié)構(gòu)的大量出現(xiàn),對(duì)此類建筑進(jìn)行隔震加固存在兩方面問題：1.不規(guī)則的結(jié)構(gòu)在地震作用下承受水平雙向地震作用,使得隔震支座處于水平雙向受剪狀態(tài),其表現(xiàn)出來的本構(gòu)關(guān)系與單向受剪時(shí)完全不同,若按原有單向分析方法難以得到合理有效的結(jié)果；2.對(duì)抗震縫寬較小的既有相鄰建筑進(jìn)行隔震加固會(huì)增加其發(fā)生碰撞的可能性,因此,利用黏滯阻尼器連接相鄰的隔震建筑以控制它們?cè)诘卣鹱饔孟碌膭?dòng)力響應(yīng),避免發(fā)生碰撞進(jìn)而危及結(jié)構(gòu)的安全。本文采用水平雙向加載裝置對(duì)LRB300和LRB400兩種規(guī)格的鉛芯橡膠支座進(jìn)行了水平雙向受剪的低周反復(fù)疲勞試驗(yàn),獲取了鉛芯橡膠支座在水平雙向1：1剪切變形時(shí)的試驗(yàn)數(shù)據(jù),并對(duì)計(jì)算得到的水平剛度和等效粘滯阻尼比進(jìn)行了比較分析。試驗(yàn)結(jié)果表明：鉛芯橡膠支座的水平剛度和等效粘滯阻尼比隨剪切變形的增加呈下降趨勢(shì),另外,在發(fā)生相同的水平方向剪切變形時(shí),鉛芯橡膠支座在雙向受剪狀態(tài)下的水平剛度和等效粘滯阻尼比均小于單向受剪時(shí)的情況。為了探討鉛芯橡膠支座雙向耦合恢復(fù)力特性對(duì)偏心隔震結(jié)構(gòu)動(dòng)力響應(yīng)的影響,本文利用結(jié)構(gòu)分析軟件對(duì)相關(guān)隔震工程算例進(jìn)行了多遇地震下的彈性時(shí)程分析及設(shè)防地震下和罕遇地震下的彈塑性時(shí)程分析,分析結(jié)果表明：不考慮鉛芯橡膠支座的雙向耦合恢復(fù)力特性時(shí),隔震結(jié)構(gòu)的動(dòng)力響應(yīng)較大,但忽略雙向耦合作用時(shí)會(huì)低估鉛芯橡膠隔震支座的變形,這對(duì)于隔震層水平位移有較高限制要求的結(jié)構(gòu)來說偏于不安全。為探討阻尼器連接相鄰隔震結(jié)構(gòu)的動(dòng)力響應(yīng),本文對(duì)黏滯阻尼器連接的相鄰隔震結(jié)構(gòu)分析模型分別進(jìn)行了多遇地震下的彈性時(shí)程分析和罕遇地震下的彈塑性時(shí)程分析。在保證相鄰隔震結(jié)構(gòu)不發(fā)生碰撞的前提下,以相鄰結(jié)構(gòu)的底部剪力較小和阻尼器出力較小為優(yōu)化目標(biāo),采用枚舉法尋求出較優(yōu)的阻尼系數(shù)和阻尼器布置位置,并探討了阻尼器參數(shù)及布置位置的變化對(duì)相鄰結(jié)構(gòu)動(dòng)力響應(yīng)的影響。分析結(jié)果表明：選取合適的阻尼器參數(shù)及布置位置時(shí),相鄰隔震結(jié)構(gòu)在地震作用下的頂層相向位移能得到有效的控制,從而避免其發(fā)生碰撞,保證結(jié)構(gòu)在地震中的安全。
[Abstract]:With the emergence of irregular structures and adjacent structures, there are two problems: 1. Under the action of earthquake, the irregular structure is subjected to horizontal and bidirectional earthquake, which makes the isolated bearing in horizontal and bidirectional shear state. The constitutive relation of the structure is completely different from that of unidirectional shear. If it is difficult to obtain reasonable and effective results according to the original one-way analysis method. Seismic isolation reinforcement of existing adjacent buildings with small seismic joint width will increase the possibility of collision. Therefore, the viscous damper is used to connect adjacent isolated buildings to control their dynamic response under earthquake. Avoid collision and endanger the safety of the structure. In this paper, the low cycle repeated fatigue tests of LRB300 and LRB400 rubber bearings under horizontal and bidirectional shear are carried out by using horizontal bidirectional loading device, and the test data of lead-core rubber bearings under horizontal and 1:1 shear deformation are obtained. The horizontal stiffness and the equivalent viscous damping ratio are compared and analyzed. The experimental results show that the horizontal stiffness and equivalent viscous damping ratio of lead rubber bearings decrease with the increase of shear deformation. In addition, when shear deformation occurs in the same horizontal direction, The horizontal stiffness and equivalent viscous damping ratio of lead-rubber bearing are smaller than those of unidirectional shear. In order to investigate the effect of bidirectional coupling restoring force characteristics of lead rubber bearing on the dynamic response of eccentrically isolated structures, In this paper, the elastic time-history analysis and the elastic-plastic time-history analysis of seismic fortification and rare earthquake are carried out for the relevant isolated engineering examples by using the structural analysis software. The results show that the dynamic response of the isolated structure is larger when the bidirectional coupling restoring force of the lead-rubber bearing is not considered, but the deformation of the lead-rubber isolation bearing will be underestimated when the bidirectional coupling is ignored. This is unsafe for structures with high limit on horizontal displacement of isolation layer. In order to study the dynamic response of adjacent isolated structures connected with dampers, the analysis models of adjacent isolated structures connected with viscous dampers are analyzed by elastic time history analysis under frequent earthquakes and elastic-plastic time history analysis under rare earthquakes, respectively. On the premise of ensuring that the adjacent isolated structures do not collide with each other, the optimum targets are the smaller shear force at the bottom of the adjacent structure and the smaller output force of the dampers. The enumeration method is used to find out the optimal damping coefficient and the location of the dampers. The influence of damper parameters and location on the dynamic response of adjacent structures is discussed. The analysis results show that the displacement of the top layer of adjacent isolated structures can be effectively controlled when the appropriate damper parameters and location are selected, thus avoiding the collision and ensuring the safety of the structure in the earthquake.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TU352.12

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