本文關(guān)鍵詞：某超高層建筑結(jié)構(gòu)抗震性能和抗震措施研究　出處：《清華大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 超高層結(jié)構(gòu) 彈塑性分析 倒塌模擬 地震剪力系數(shù) 抗震措施

【摘要】：近年來超高層建筑在我國發(fā)展得越來越迅速,尤其是500 m以上的超高層建筑在我國各地不斷涌現(xiàn)。我國是地震高發(fā)區(qū),對(duì)于結(jié)構(gòu)設(shè)計(jì)人員而言,需要準(zhǔn)確把握超高層建筑的抗震性能,提出合理的抗震措施。本文以某在建超高層建筑為例,研究了其在設(shè)防大震下及極罕遇地震下的抗震性能,并對(duì)結(jié)構(gòu)設(shè)計(jì)中的難點(diǎn)問題進(jìn)行了探討,提出了改善建筑結(jié)構(gòu)抗震性能的設(shè)計(jì)建議。具體工作內(nèi)容包括:(1)基于大型通用有限元程序,建立了背景工程的計(jì)算模型,并完成了設(shè)防大震下的彈塑性分析和極罕遇地震下的抗倒塌分析。分析結(jié)果表明,該工程各項(xiàng)指標(biāo)均能滿足性能化設(shè)計(jì)需求,并能實(shí)現(xiàn)“小震不壞,大震不倒”的設(shè)計(jì)目標(biāo),具備一定程度的抗倒塌安全儲(chǔ)備。結(jié)構(gòu)中上部為變形較大部位,同時(shí)也是結(jié)構(gòu)倒塌的主要危險(xiǎn)部位。(2)提出三種最小地震剪力系數(shù)的控制方法,并分別設(shè)計(jì)了三個(gè)結(jié)構(gòu),比較了不同設(shè)計(jì)模型的抗震性能和抗倒塌性能。研究表明,采用現(xiàn)行規(guī)范規(guī)定的剛度控制方法來滿足最小地震剪力系數(shù)的規(guī)定,所設(shè)計(jì)的結(jié)構(gòu)材料用量過大,結(jié)構(gòu)構(gòu)件承載力利用率較低,而其抗震性能和抗倒塌性能卻比其他兩個(gè)采用強(qiáng)度控制方法的結(jié)構(gòu)提高有限。故針對(duì)此結(jié)構(gòu),宜采用基于強(qiáng)度的最小地震剪力系數(shù)控制辦法滿足最小地震剪力系數(shù)的規(guī)定。(3)建立了兩種剪力墻內(nèi)支撐布置方案的分析模型,比較了兩模型的材料用量,抗震性能和抗倒塌性能。分析結(jié)果表明,結(jié)構(gòu)中上部剪力墻內(nèi)布置鋼支撐所增加的用鋼量較小,但能夠較好地提升結(jié)構(gòu)在大震下的抗倒塌性能,為類似超高層建筑結(jié)構(gòu)抗震設(shè)計(jì)提供參考。(4)對(duì)背景工程的雙連梁布置方案進(jìn)行了分析和比較,并完善了現(xiàn)有計(jì)算程序的殼單元能量計(jì)算和輸出方法,從耗能角度比較了不同連梁布置方案對(duì)整體結(jié)構(gòu)抗震性能的影響,為背景工程的連梁設(shè)計(jì)提出優(yōu)化建議。
[Abstract]:In recent years, super-tall buildings are developing more and more rapidly in our country, especially the super-tall buildings above 500m are emerging all over our country. China is a high earthquake area, for structural designers. It is necessary to accurately grasp the seismic performance of super tall buildings and put forward reasonable seismic measures. This paper takes a building under construction as an example to study its seismic performance under fortification and rare earthquakes. The difficult problems in the structural design are discussed, and the design suggestions for improving the seismic performance of the building structure are put forward. The specific work includes: 1) based on the large-scale universal finite element program. The calculation model of background engineering is established, and the elastic-plastic analysis under fortification and the anti-collapse analysis under rare earthquake are completed. The analysis results show that each index of the project can meet the requirements of performance-based design. It can realize the design goal of "small earthquake is not bad, big earthquake can not fall", and has a certain degree of anti-collapse safety reserve, and the upper part of the structure is a large deformation part. At the same time, it is also the main dangerous part of the collapse of the structure.) three kinds of control methods of minimum seismic shear coefficient are proposed and three structures are designed respectively. The aseismic performance and collapse resistance of different design models are compared. The results show that the structural materials used in the design are too large by using the stiffness control method stipulated in the current code to meet the minimum seismic shear coefficient. The efficiency of carrying capacity of structural members is low, but its seismic performance and anti-collapse performance are limited compared with the other two structures using strength control method. The control method of minimum seismic shear coefficient based on strength is suitable to meet the minimum seismic shear coefficient.) the analysis models of two kinds of bracing schemes in shear wall are established and the material consumption of the two models is compared. The results show that the increase of steel bracing in the middle and upper shear wall is small, but it can improve the collapse resistance of the structure under the strong earthquake. It provides reference for seismic design of super high-rise building structure. It also analyzes and compares the arrangement of double connected beam in background engineering, and consummates the energy calculation and output method of shell element of existing calculation program. From the point of view of energy consumption, the effects of different arrangement schemes of connecting beams on the seismic performance of the whole structure are compared, and the optimization suggestions for the design of connected beams in the background engineering are put forward.
【學(xué)位授予單位】：清華大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU973.31

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