發(fā)布時(shí)間：2018-11-11 20:32

【摘要】：框架結(jié)構(gòu)和框架-支撐結(jié)構(gòu)在高層建筑中應(yīng)用非常廣泛。純框架結(jié)構(gòu)的抗側(cè)剛度有限，在地震和強(qiáng)風(fēng)荷載作用下，側(cè)向位移較大，限制了它的應(yīng)用高度�？蚣苤�撐結(jié)構(gòu)在某種程度上提高了結(jié)構(gòu)的抗側(cè)剛度，但其在強(qiáng)震作用下易產(chǎn)生受壓屈曲，極易導(dǎo)致支撐自身或連接的失效甚至破壞。同時(shí)支撐屈服后很難有效耗能，降低了結(jié)構(gòu)的抗震能力。目前發(fā)展起來(lái)的防屈曲耗能支撐有效解決了普通受壓屈曲的問(wèn)題。本文在一定的理論研究和試驗(yàn)的基礎(chǔ)上，研究防屈曲耗能支撐在實(shí)際工程中的應(yīng)用和可行性。本文主要從以下幾個(gè)方面研究： 1）首先以河南省新鄉(xiāng)市某九層框架結(jié)構(gòu)為例，運(yùn)用有限元分析軟件SAP2000，對(duì)原框架結(jié)構(gòu)、框架加普通支撐結(jié)構(gòu)及框架加防屈曲耗能支撐結(jié)構(gòu)進(jìn)行振型分解反應(yīng)譜分析及線(xiàn)性時(shí)程分析，對(duì)比三種結(jié)構(gòu)體系的周期、層間位移、基底剪力及支撐軸力等地震響應(yīng)，繪制出防屈曲耗能支撐在小震、中震、大震下的滯回曲線(xiàn)。結(jié)果表明，小震下防屈曲耗能支撐具有與普通支撐基本一致的抗震性能；在中震及大震下，防屈曲耗能支撐進(jìn)入工作耗能，通過(guò)滯回耗散地震能量，耗能減震效果明顯。 2）在明確了防屈曲耗能支撐的優(yōu)勢(shì)之后，本文以西安市某五層框架結(jié)構(gòu)為例，通過(guò)D值法計(jì)算出結(jié)構(gòu)的抗側(cè)剛度，在給定目標(biāo)位移的前提下，根據(jù)支撐剛度與框架抗側(cè)剛度比λ計(jì)算出防屈曲耗能支撐面積。并對(duì)防屈曲耗能支撐多種布置方案進(jìn)行罕遇地震下的靜力彈塑性分析，通過(guò)對(duì)比各種方案下塑性鉸的發(fā)展情況及地震響應(yīng)（周期、層間位移、基底剪力等）得出在支撐面積一定的情況下何種布置方案最佳。以其中兩種方案為例，通過(guò)得出的基底剪力-頂點(diǎn)位移曲線(xiàn)、性能點(diǎn)、層間位移角推覆過(guò)程進(jìn)一步說(shuō)明防屈曲耗能支撐能夠在罕遇地震下有更充足的安全儲(chǔ)備。 3）在討論了防屈曲耗能支撐的優(yōu)化布置后，本文以一變更工程（設(shè)防烈度提高）為例，，在原構(gòu)件截面尺寸、構(gòu)件配筋不變的前提下，通過(guò)增設(shè)防屈曲耗能支撐，得到規(guī)范限值內(nèi)的地震響應(yīng)。由此說(shuō)明防屈曲耗能支撐在抗震加固或設(shè)計(jì)變更工程中有非常好的應(yīng)用價(jià)值。
[Abstract]:Frame structure and frame-braced structure are widely used in high-rise buildings. The lateral stiffness of the pure frame structure is limited, and the lateral displacement is larger under earthquake and strong wind loads, which limits its application height. The frame braced structure improves the lateral stiffness of the structure to some extent, but it is easy to produce compression buckling under the action of strong earthquake, which easily leads to the failure and even failure of the bracing itself or connection. At the same time, it is difficult to consume energy effectively after bracing yield, which reduces the seismic capacity of the structure. The current development of anti-buckling energy dissipation braces effectively solves the problem of general compression buckling. On the basis of theoretical research and experiment, this paper studies the application and feasibility of anti-buckling energy dissipation support in practical engineering. This paper mainly studies from the following aspects: 1) take a nine-story frame structure in Xinxiang City, Henan Province as an example, and use the finite element analysis software SAP2000, to analyze the original frame structure. The vibration mode decomposition response spectrum analysis and linear time history analysis of frame and general braced structure and frame structure with anti-buckling energy dissipation bracing are carried out, and the seismic responses of the three structural systems, such as period, interstory displacement, base shear force and bracing axial force, are compared. The hysteretic curves of anti-buckling energy dissipation support under small, moderate and large earthquakes are drawn. The results show that the anti-buckling energy dissipation braces have the same seismic performance as the common braces under small earthquakes, and under moderate and strong earthquakes, the anti-buckling energy dissipation braces enter into the work energy consumption, and the energy dissipation effect is obvious through the hysteretic dissipation of seismic energy. 2) after defining the advantages of anti-buckling and energy-dissipation bracing, taking a five-story frame structure in Xi'an as an example, the lateral stiffness of the structure is calculated by D value method, and the displacement of the target is given. According to the ratio of bracing stiffness to lateral stiffness of frame, the area of anti-buckling energy dissipation bracing is calculated. The static elastic-plastic analysis of various arrangement schemes of anti-buckling energy dissipation bracing is carried out under rare earthquake. By comparing the development of plastic hinge and seismic response (period, interstory displacement) under various schemes, Base shear, etc.) to get the best arrangement under the condition of certain supporting area. Taking two schemes as an example, the shear-vertex displacement curve, the performance point and the interstory displacement angle push-over process obtained further show that the anti-buckling energy dissipation braces have more sufficient safety reserves under rare earthquakes. 3) after discussing the optimal arrangement of the anti-buckling energy dissipation braces, this paper takes a change engineering (increasing the fortification intensity) as an example, under the premise of the original member section size and the reinforcement constant, by adding the anti-buckling energy dissipation bracing. The seismic response within the specified limit is obtained. It shows that the buckling-proof energy dissipation braces have very good application value in seismic reinforcement or design change engineering.
【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(lèi)號(hào)】：TU973.31

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