本文選題：混凝土框架結(jié)構(gòu) + 增量動(dòng)力分析��； 參考：《西安建筑科技大學(xué)》2015年碩士論文

【摘要】：鋼筋混凝土框架結(jié)構(gòu)作為一種廣泛使用的結(jié)構(gòu)形式,其抗震性能也一直為國內(nèi)外所關(guān)注。大量的震害調(diào)查表明,框架結(jié)構(gòu)的破壞模式以整體倒塌為主,外圍圍護(hù)結(jié)構(gòu)及填充墻的破壞也比較顯著。近年來,國內(nèi)外對增量動(dòng)力分析(IDA)方法及其結(jié)構(gòu)的抗震性能進(jìn)行了較多的研究,但地震強(qiáng)度參數(shù)的選取、結(jié)構(gòu)抗震性能影響因素等問題的研究還不夠深入。本文以鋼筋混凝土框架結(jié)構(gòu)為研究模型,通過增量動(dòng)力分析方法對結(jié)構(gòu)進(jìn)行地震易損性評價(jià),對比不同地震動(dòng)強(qiáng)度參數(shù)確定其在IDA分析中的有效性,并分析填充墻布置形式、軸壓比和混凝土強(qiáng)度等級對結(jié)構(gòu)抗震性能的影響。本文采用Perform3D軟件,分別建立了3層、6層、9層與12層鋼筋混凝土平面框架,通過IDA分析,得到了IM-θmax分位數(shù)曲線和θmax的條件對數(shù)標(biāo)準(zhǔn)差,研究了不同高度框架結(jié)構(gòu)在地震作用下,以不同地震動(dòng)強(qiáng)度參數(shù)(Sa、PGA、PGV、S*)表示的IDA曲線的離散性變化,進(jìn)而分析各個(gè)強(qiáng)度參數(shù)的有效性。通過IDA分析數(shù)據(jù)繪制結(jié)構(gòu)的地震易損性曲線,對框架結(jié)構(gòu)進(jìn)行大震及巨震作用下的抗倒塌能力評價(jià)可知,按照我國規(guī)范進(jìn)行常規(guī)設(shè)計(jì)的框架結(jié)構(gòu)可以滿足規(guī)范規(guī)定的抗震設(shè)防要求。此外,通過不同地震動(dòng)強(qiáng)度參數(shù)表示的結(jié)構(gòu)易損性矩陣對比,綜合分析得到在框架結(jié)構(gòu)的IDA分析中PGV的有效性較高,而且作為地震易損性分析的強(qiáng)度參數(shù)得到的超越概率值較為保守,有利于結(jié)構(gòu)安全。通過易損性分析研究了填充墻布置、軸壓比、混凝土強(qiáng)度這三個(gè)因素對框架結(jié)構(gòu)抗震性能的影響,結(jié)果顯示均勻布置的填充墻、軸壓比的降低以及混凝土強(qiáng)度的提高都對框架結(jié)構(gòu)的抗震能力有一定程度上的改善,為結(jié)構(gòu)性能設(shè)計(jì)的細(xì)化提供參考。
[Abstract]:Reinforced concrete frame structure as a widely used structural form, its seismic performance has been concerned at home and abroad. A large number of earthquake damage investigations show that the failure mode of the frame structure is mainly the collapse of the whole, and the damage of the peripheral envelope structure and the infilled wall is also obvious. In recent years, many researches have been done on the incremental dynamic analysis (IDA) method and the seismic performance of the structure. However, the selection of seismic intensity parameters and the factors affecting the seismic performance of the structure are not sufficiently studied. In this paper, the reinforced concrete frame structure is taken as the research model, the seismic vulnerability of the structure is evaluated by incremental dynamic analysis method, the validity of the structure in IDA analysis is determined by comparing the different seismic intensity parameters, and the layout of the infilled wall is analyzed. The influence of axial compression ratio and concrete strength grade on the seismic performance of the structure. In this paper, Perform3D software is used to set up three or six stories and nine and twelve stories reinforced concrete frame respectively. Through IDA analysis, the IM- 胃 max quantile curve and the conditional logarithmic standard deviation of 胃 max are obtained, and the seismic action of different height frame structures is studied. The discrete variation of IDA curve expressed by different ground motion intensity parameters is analyzed, and the validity of each strength parameter is analyzed. The seismic vulnerability curve of the frame structure is drawn by the IDA analysis data, and the anti-collapse ability of the frame structure under the action of large earthquake and giant earthquake is evaluated. The frame structure designed according to the code of our country can meet the requirements of seismic fortification stipulated in the code. In addition, by comparing the structural vulnerability matrices with different ground motion intensity parameters, it is concluded that PGV is more effective in the IDA analysis of frame structures. Furthermore, the transcendental probability obtained as the strength parameter of seismic vulnerability analysis is conservative, which is beneficial to structural safety. Through vulnerability analysis, the effects of three factors on seismic performance of frame structure, such as the arrangement of infilled wall, axial compression ratio and strength of concrete, are studied. The results show that the infilled wall is uniformly arranged. The decrease of axial compression ratio and the improvement of concrete strength can improve the seismic capacity of frame structure to a certain extent and provide a reference for the refinement of structural performance design.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU375.4

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