本文選題：防屈曲支撐 + 粘滯阻尼器�。� 參考：《天津大學(xué)》2014年碩士論文

【摘要】：我國是世界上地震活動(dòng)最為頻繁的國家之一,長期以來地震給我國帶來了巨大的災(zāi)難,所以在我國提高抗震能力,促進(jìn)消能減震技術(shù)的發(fā)展顯得尤為重要。隨著我國經(jīng)濟(jì)的發(fā)展,城市化進(jìn)程中高層、超高層建筑的不斷涌現(xiàn),高層減震技術(shù)的研究有其必要性和緊迫性。本文通過查閱大量文獻(xiàn),總結(jié)了粘滯阻尼器、防屈曲支撐、混合阻尼器在國內(nèi)外的一些試驗(yàn)研究以及實(shí)際工程的應(yīng)用。介紹了阻尼器的類型及減震原理,探討了阻尼器附加阻尼比的求解方法及減震結(jié)構(gòu)的分析方法,同時(shí)對(duì)防屈曲支撐和粘滯阻尼器混合使用時(shí)的設(shè)計(jì)方法提出了一些建議。以某實(shí)際工程為研究背景,使用SAP2000軟件建立結(jié)構(gòu)模型進(jìn)行分析,以研究防屈曲支撐和粘滯阻尼器混合使用時(shí)的減震性能。同時(shí)對(duì)混合阻尼器在結(jié)構(gòu)水平方向和豎直方向的布置進(jìn)行探討。本文主要可得如下結(jié)論:(1)對(duì)于粘滯阻尼器和防屈曲支撐混合使用的減震結(jié)構(gòu),在多遇地震下,防屈曲支撐可設(shè)計(jì)成彈性狀態(tài),粘滯阻尼器處于耗能狀態(tài),通過設(shè)置等剛度的普通支撐模擬防屈曲支撐,同時(shí)通過對(duì)結(jié)構(gòu)模型阻尼比參數(shù)的調(diào)整來考慮粘滯阻尼器的貢獻(xiàn),從而可以直接使用振型分解反應(yīng)譜法對(duì)混合阻尼器結(jié)構(gòu)進(jìn)行計(jì)算分析。(2)混合阻尼器可以很好的減小結(jié)構(gòu)的層間位移,在多遇地震下,結(jié)構(gòu)X向和Y向的最大層間位移分別減小42%和49%,在罕遇地震下,結(jié)構(gòu)X向和Y向的最大層間位移分別減小39.1%和40%�；旌献枘崞鲗�(duì)結(jié)構(gòu)的基底剪力有良好的控制效果,在多遇地震下,結(jié)構(gòu)X向基底剪力增加5.6%,Y向基底剪力減小3%,在罕遇地震下,結(jié)構(gòu)X向和Y向的基底剪力分別減小8.4%和4%。(3)通過對(duì)阻尼器實(shí)際工程應(yīng)用和減震性能研究的基礎(chǔ)上可得:混合阻尼器可實(shí)現(xiàn)對(duì)結(jié)構(gòu)剛度調(diào)節(jié)和附加阻尼的靈活控制,為結(jié)構(gòu)設(shè)計(jì)提供了新的抗震設(shè)計(jì)思路,可以優(yōu)化結(jié)構(gòu)構(gòu)件的截面尺寸,降低結(jié)構(gòu)的配筋量。(4)混合阻尼器水平方向布置分析表明:將防屈曲支撐布置在結(jié)構(gòu)外側(cè),粘滯阻尼器布置在結(jié)構(gòu)內(nèi)側(cè)時(shí),對(duì)結(jié)構(gòu)層間位移和基底剪力的影響不大,同時(shí)可以很好的提高結(jié)構(gòu)的抗扭能力,有效減少結(jié)構(gòu)的破壞。(5)混合阻尼器豎向布置分析表明:對(duì)結(jié)構(gòu)的下部樓層布置防屈曲支撐可調(diào)節(jié)結(jié)構(gòu)剛度,上部樓層布置粘滯阻尼器可發(fā)揮速度型阻尼器的耗能特性,更好的減小結(jié)構(gòu)的層間位移,提高結(jié)構(gòu)的抗扭性能,有效減少結(jié)構(gòu)下部樓層框架柱的破壞。
[Abstract]:China is one of the countries with the most frequent seismicity in the world. Earthquake has brought great disaster to our country for a long time, so it is very important to improve the seismic capacity and promote the development of energy dissipation and seismic absorption technology in our country. With the development of our economy and the continuous emergence of high-rise buildings in the process of urbanization, it is necessary and urgent to study the technology of high-rise seismic absorption. In this paper, some experimental studies and practical engineering applications of viscous dampers, buckling braces and hybrid dampers are summarized by consulting a large number of literatures. This paper introduces the type and principle of dampers, discusses the method of solving the additional damping ratio of dampers and the analysis method of dampers, and puts forward some suggestions for the design of anti-buckling braces and viscous dampers. On the background of a practical project, a structural model was established by using SAP2000 software to study the seismic absorption performance of buckling braces and viscous dampers. At the same time, the arrangement of hybrid dampers in horizontal and vertical direction is discussed. In this paper, the main conclusions are as follows: (1) for the damping structures with viscous dampers and anti-buckling braces, the anti-buckling braces can be designed as elastic state and the viscous dampers are in the energy dissipation state under frequent earthquakes. The contribution of viscous dampers is considered by adjusting the damping ratio parameters of the structure model by setting the common braces with equal stiffness to simulate the buckling braces. Therefore, the modal decomposition response spectrum method can be directly used to calculate and analyze the hybrid dampers. The maximum interstory displacements in X and Y directions are reduced by 42% and 49%, respectively. Under rare earthquakes, the maximum interstory displacements in X and Y directions are reduced by 39. 1% and 40%, respectively. Hybrid dampers have a good control effect on the base shear force of the structure. Under frequent earthquakes, the X direction base shear force increases by 5.6% and the Y direction base shear force decreases by 3 parts, and under rare earthquakes, the X direction base shear force decreases by 3 parts. On the basis of the practical engineering application of the damper and the study of the damping performance, it can be obtained that the hybrid damper can realize the flexible control of the stiffness adjustment and the additional damping of the structure, and reduce the base shear force of the structure in the direction of X and Y by 8.4% and 4% respectively. This paper provides a new seismic design idea for structural design, which can optimize the section size of structural members and reduce the reinforcement of the structure. The analysis of horizontal direction arrangement of hybrid dampers shows that the buckle-resistant braces are arranged on the outside of the structure. When the viscous dampers are arranged on the inner side of the structure, there is little effect on the displacement between the layers and the shear force of the base, and the torsional resistance of the structure can be improved very well at the same time. The analysis of vertical arrangement of hybrid dampers shows that the stiffness of the structure can be adjusted by the arrangement of anti-buckling braces on the lower floors of the structure, and the energy dissipation characteristics of the speed dampers can be played by the viscous dampers in the upper floors. The floor displacement of the structure is reduced better, the torsional resistance of the structure is improved, and the failure of the frame column on the lower floor of the structure is effectively reduced.
【學(xué)位授予單位】：天津大學(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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本文編號(hào)：1938121