【摘要】：偏心支撐結(jié)構(gòu)是一種高烈度地震區(qū)高層建筑鋼結(jié)構(gòu)良好的水平抗側(cè)力體系，但在強(qiáng)烈地震作用下，耗能梁段會(huì)產(chǎn)生過(guò)大的剪切塑性變形，導(dǎo)致混凝土樓板嚴(yán)重破壞，修復(fù)難度較大。本文針對(duì)偏心支撐結(jié)構(gòu)存在的問(wèn)題，提出了一種在X型偏心支撐中間內(nèi)置鋼板剪力墻的新型結(jié)構(gòu)形式——偏心支撐式鋼板剪力墻，并利用有限元分析軟件ANSYS分析研究了偏心支撐式鋼板剪力墻的抗震性能，主要的研究?jī)?nèi)容及結(jié)論如下： （1）利用有限元ANSYS軟件模擬了兩層D形偏心支撐鋼框架的擬靜力試驗(yàn)，主要從滯回曲線、骨架曲線和應(yīng)力分布方面與試驗(yàn)結(jié)果進(jìn)行了對(duì)比分析。有限元結(jié)果與試驗(yàn)結(jié)果吻合良好，為后續(xù)偏心支撐式鋼板剪力墻的研究提供了依據(jù)。 （2）分別從單調(diào)加載曲線、滯回曲線、骨架曲線、耗能系數(shù)、應(yīng)力分布與變形五方面對(duì)偏心支撐式鋼板墻結(jié)構(gòu)與X形偏心支撐鋼框架結(jié)構(gòu)進(jìn)行了系統(tǒng)的、深入的對(duì)比分析，分析結(jié)果表明：偏心支撐式鋼板剪力墻結(jié)構(gòu)不僅可以有效地保證斜支撐不發(fā)生屈曲，而且還可以減小耗能梁段的塑性變形，從而減小混凝土樓板的破壞程度；同時(shí)它具有較大的承載力和優(yōu)越的耗能能力。 （3）通過(guò)改變中心鋼板剪力墻的大小，設(shè)計(jì)了3個(gè)不同參數(shù)的偏心支撐式鋼板剪力墻，進(jìn)行單調(diào)加載和循環(huán)加載的研究，對(duì)比分析了單調(diào)加載曲線、滯回曲線、骨架曲線及耗能系數(shù)。分析結(jié)果表明：承載力隨著中心鋼板墻的尺寸的減小而下降，但下降幅度不大，僅在10%以內(nèi)；中心鋼板剪力墻的大小取結(jié)構(gòu)外框架尺寸的1/3倍時(shí)，結(jié)構(gòu)的承載力和耗能能力較好。 （4）通過(guò)改變耗能梁段的長(zhǎng)度，設(shè)計(jì)了5個(gè)不同參數(shù)的偏心支撐式鋼板剪力墻，進(jìn)行單調(diào)加載和循環(huán)加載的研究，，對(duì)比分析了單調(diào)加載曲線、滯回曲線、骨架曲線及耗能系數(shù)。分析結(jié)果表明：剪切屈服型的耗能梁段相比彎曲屈服型耗能梁段，對(duì)結(jié)構(gòu)的抗震性能更有利；耗能梁段的長(zhǎng)度在1.0M p V p~1.3M p V p范圍內(nèi)時(shí)，結(jié)構(gòu)的承載力和耗能能力較好。 （5）通過(guò)改變內(nèi)填鋼板的高厚比，設(shè)計(jì)了5個(gè)不同參數(shù)的偏心支撐式鋼板剪力墻，對(duì)比分析了滯回曲線、骨架曲線及耗能系數(shù)。分析結(jié)果表明：內(nèi)填鋼板的高厚比取200時(shí)，結(jié)構(gòu)的承載力和耗能能力均較好。
[Abstract]:Eccentrically braced structure is a kind of good horizontal lateral force resisting system of steel structure of high-rise building in high intensity earthquake area. However, under the action of strong earthquake, the energy dissipation beam section will produce too large shear plastic deformation, which will lead to serious damage of concrete floor. It is difficult to repair. Aiming at the problems of eccentrically braced structure, a new type of steel plate shear wall, eccentrically supported steel plate shear wall, is put forward in this paper, which is built in the middle of X-type eccentrically braced steel plate shear wall. The seismic behavior of eccentrically braced steel plate shear wall is studied by finite element analysis software ANSYS. The main research contents and conclusions are as follows: (1) Quasi-static test of two-story D-shaped eccentrically braced steel frame is simulated by using finite element ANSYS software, mainly from hysteretic curve. The skeleton curve and stress distribution are compared with the experimental results. The finite element results are in good agreement with the experimental results, which provides a basis for the further study of eccentrically braced steel plate shear walls. (2) from the monotone loading curve, hysteretic curve, skeleton curve, energy dissipation coefficient, respectively. In this paper, the stress distribution and deformation of eccentrically braced steel plate wall structure and X-shaped eccentrically braced steel frame structure are systematically compared and analyzed. The results show that the eccentrically braced steel plate shear wall structure not only can effectively ensure that the oblique bracing does not occur buckling, but also can reduce the plastic deformation of the energy-dissipation beam, thus reducing the failure degree of concrete floor. At the same time, it has great bearing capacity and superior energy dissipation ability. (3) by changing the size of the central steel plate shear wall, three eccentrically braced steel plate shear walls with different parameters are designed to study the monotonic loading and cyclic loading. The monotone loading curve, hysteretic curve, skeleton curve and energy dissipation coefficient are compared and analyzed. The results show that the bearing capacity decreases with the decrease of the size of the central steel plate wall, but the decrease is not significant, which is less than 10%, and when the size of the central steel plate shear wall is 1 / 3 times the size of the outer frame of the structure, The bearing capacity and energy dissipation capacity of the structure are good. (4) by changing the length of the energy dissipation beam section, five eccentrically braced steel plate shear walls with different parameters are designed to study the monotone loading and cyclic loading. The monotone loading curve, hysteretic curve, skeleton curve and energy dissipation coefficient are compared and analyzed. The results show that the shear yield beam section is more favorable to the seismic performance of the structure than the bending yield type energy dissipation beam section, and when the length of the energy dissipation beam section is within the range of 1.0 m p V V and 1.3 m p V p p, the shear yield type beam segment is more favorable to the seismic performance of the structure than that of the bending yield type beam section. (5) five eccentrically braced steel plate shear walls with different parameters are designed by changing the ratio of height to thickness. The hysteretic curve, skeleton curve and energy dissipation coefficient are compared and analyzed. The results show that the bearing capacity and energy dissipation capacity of the structure are better when the ratio of height to thickness is 200.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU973.13;TU973.31

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