【摘要】：近年來(lái),越來(lái)越多的建筑結(jié)構(gòu)采用消能器對(duì)結(jié)構(gòu)進(jìn)行消能減震設(shè)計(jì),以粘滯阻尼器與BRB的應(yīng)用較為廣泛,通過(guò)合理設(shè)計(jì)兩者在結(jié)構(gòu)中的布置方案,可以得到更加優(yōu)良的消能減震效果。因此,本文針對(duì)粘滯阻尼器與BRB在結(jié)構(gòu)中混合減震的布置方案等方面展開(kāi)了研究,主要內(nèi)容如下:1.通過(guò)ETABS有限元軟件建立30層的框架-核心筒結(jié)構(gòu)模型,并對(duì)其分別設(shè)置H型鋼支撐(加強(qiáng)層)、BRB、粘滯阻尼器得到三種不同的結(jié)構(gòu)體系,對(duì)比三種結(jié)構(gòu)體系在多遇、設(shè)防、罕遇地震作用下的抗震性能。結(jié)果表明:將BRB或粘滯阻尼器設(shè)置于框架-核心筒結(jié)構(gòu)中,可以獲得比加強(qiáng)層結(jié)構(gòu)更優(yōu)良的抗震性能;BRB對(duì)結(jié)構(gòu)側(cè)向位移的控制效果要優(yōu)于粘滯阻尼器,但粘滯阻尼器對(duì)地震能量的耗散能力大于BRB。2.同時(shí)將粘滯阻尼器與BRB設(shè)置于上述的框架-核心筒結(jié)構(gòu)中,得到4種不同的混合減震方案,為了與混合減震方案對(duì)比,分別設(shè)計(jì)了僅設(shè)置一種阻尼器的粘滯阻尼器結(jié)構(gòu)和BRB結(jié)構(gòu),將6種減震方案進(jìn)行多遇、罕遇地震作用下的地震反應(yīng)對(duì)比分析。結(jié)果表明:在多遇地震下,混合減震結(jié)構(gòu)的抗震性能介于BRB結(jié)構(gòu)與粘滯阻尼器結(jié)構(gòu)之間;在罕遇地震下,混合減震結(jié)構(gòu)對(duì)層間位移角的控制效果優(yōu)于粘滯阻尼器結(jié)構(gòu),混合減震結(jié)構(gòu)對(duì)基底剪力峰值和頂點(diǎn)最大加速度的控制效果優(yōu)于BRB結(jié)構(gòu)和粘滯阻尼器結(jié)構(gòu);在4種混合減震方案中,當(dāng)以結(jié)構(gòu)的樓層剪力、基底剪力為減震控制目標(biāo)時(shí),方案1為最優(yōu)方案,當(dāng)以結(jié)構(gòu)的層間位移角、頂點(diǎn)位移、頂點(diǎn)加速度為減震控制目標(biāo)時(shí),方案2為最優(yōu)方案。3.以14層的框架-剪力墻結(jié)構(gòu)為研究對(duì)象,對(duì)其同時(shí)設(shè)置粘滯阻尼器與BRB,得到4種不同的混合減震方案,并且設(shè)計(jì)了僅設(shè)置一種阻尼器的粘滯阻尼器結(jié)構(gòu)和BRB結(jié)構(gòu)。對(duì)比6種減震結(jié)構(gòu)在多遇、罕遇地震作用下的地震反應(yīng)結(jié)果。研究表明:在多遇地震下,4種混合減震結(jié)構(gòu)的抗震性能介于BRB結(jié)構(gòu)與粘滯阻尼器結(jié)構(gòu)之間,在4種混合減震結(jié)構(gòu)中,方案2的減震效果最佳;在罕遇地震下,在4種混合減震結(jié)構(gòu)、BRB結(jié)構(gòu)、粘滯阻尼器結(jié)構(gòu)中,方案2對(duì)頂點(diǎn)最大位移、最大層間位移角、基底剪力峰值的控制效果最好。4.為了進(jìn)一步分析粘滯阻尼器與BRB對(duì)框架-剪力墻結(jié)構(gòu)的混合減震效果,采用SAP2000有限元軟件,將上述的方案2與原結(jié)構(gòu)進(jìn)行彈塑性時(shí)程的對(duì)比分析。結(jié)果表明:對(duì)框架-剪力墻結(jié)構(gòu)采用粘滯阻尼器與BRB的混合減震,不僅可以減少框架的塑性鉸數(shù)量,而且可以降低塑性鉸的破壞程度,但對(duì)于剪力墻的混凝土層和鋼筋層的最大應(yīng)力的控制效果并不明顯。
[Abstract]:In recent years, more and more building structures use energy dissipators to design energy dissipation and vibration absorption. The viscous dampers and BRB are widely used. Better energy dissipation and damping effect can be obtained. Therefore, in this paper, the arrangement of hybrid damping of viscous dampers and BRB in the structure is studied. The main contents are as follows: 1. A 30-story frame-core tube structure model is established by ETABS finite element software, and H-section steel braces are set up respectively. Three different structural systems are obtained by means of), BRB, viscous dampers of strengthened layer, and the three structural systems are compared in frequent occurrence and fortification. Seismic behavior of rare earthquakes. The results show that when BRB or viscous dampers are placed in the frame-core tube structure, the seismic performance of the structure can be better than that of the strengthened story structure. The control effect of BRB on lateral displacement of structures is better than that of viscous dampers, but the dissipation ability of viscous dampers to seismic energy is greater than that of BRB.2.. At the same time, the viscous damper and BRB are arranged in the frame-core tube structure mentioned above, and four different hybrid shock absorption schemes are obtained. A viscous damper structure and a BRB structure with only one damper are designed, and the seismic responses of six kinds of shock absorption schemes under rare and rare earthquakes are compared and analyzed. The results show that the seismic behavior of hybrid dampers is between BRB structure and viscous damper structure. Under rare earthquake, the control effect of hybrid damping structure on interstory displacement angle is better than that of viscous damper structure, and the control effect of hybrid damping structure on peak value of base shear force and maximum acceleration of vertex is better than that of BRB structure and viscous damper structure. In the four hybrid damping schemes, when the floor shear force and the base shear force of the structure are taken as the damping control target, scheme 1 is the optimal scheme, and when the interstory displacement angle, the vertex displacement and the peak acceleration of the structure are taken as the damping control targets, Option 2 is the best option. Taking the 14-story frame-shear wall structure as the research object, four different hybrid shock absorption schemes are obtained by setting the viscous damper and BRB, simultaneously, and the viscous damper structure and the BRB structure with only one damper are designed. The results of seismic response of 6 kinds of structures under rare and rare earthquakes are compared. The results show that the seismic performance of the four hybrid dampers is between the BRB structure and the viscous damper structure under the frequent earthquake. Among the four hybrid dampers, scheme 2 is the best. In the rare earthquake, among the four kinds of hybrid seismic absorption structure, BRB structure and viscous damper structure, the control effect of scheme 2 is the best for the maximum displacement of the vertex, the maximum displacement angle between layers and the peak value of the base shear force. In order to further analyze the effect of viscous damper and BRB on the hybrid seismic absorption of frame-shear wall structure, the elastoplastic time history of the above scheme 2 is compared with that of the original structure by using SAP2000 finite element software. The results show that the combination of viscous dampers and BRB for frame-shear wall structures can not only reduce the number of plastic hinges, but also reduce the failure degree of plastic hinges. However, the control effect on the maximum stress of concrete and reinforced layer of shear wall is not obvious.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU352.1

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本文編號(hào)：2375319