發(fā)布時(shí)間：2019-03-05 08:10

【摘要】：歷史地震記錄表明:一次主震過(guò)后通常伴有多次余震的發(fā)生。結(jié)構(gòu)在遭受主震損傷后,在余震作用下發(fā)生倒塌的可能性大大增加。然而,現(xiàn)有的設(shè)計(jì)規(guī)范和相關(guān)研究,對(duì)主震損傷結(jié)構(gòu)的抗余震倒塌能力評(píng)估不足。為此,本文以一棟四層和一棟八層鋼筋混凝土框架結(jié)構(gòu)為研究對(duì)象,考慮不同主震損傷場(chǎng)景和余震譜型的影響,對(duì)主震損傷結(jié)構(gòu)的余震倒塌易損性進(jìn)行深入研究,主要研究?jī)?nèi)容如下:(1)研究余震次數(shù)和強(qiáng)度對(duì)RC框架結(jié)構(gòu)地震反應(yīng)的影響。分別采用最大層間位移角、最大頂點(diǎn)位移以及改進(jìn)的Park-Ang損傷指數(shù)作為結(jié)構(gòu)的反應(yīng)參數(shù),選擇一組具有多次余震記錄的主余震序列作為輸入,選擇具有大震級(jí)的余震與主震組成具有一次余震記錄的主余震序列,將結(jié)構(gòu)在多次余震作用下的反應(yīng)與其在一次余震作用下的反應(yīng)進(jìn)行對(duì)比,對(duì)結(jié)構(gòu)增量損傷的影響進(jìn)行對(duì)比。進(jìn)一步考慮主余震PGA以及Arias強(qiáng)度與結(jié)構(gòu)增量損傷之間的關(guān)系,初步分析余震強(qiáng)度對(duì)結(jié)構(gòu)在主余震序列作用下增量損傷的影響。(2)開(kāi)展考慮主震損傷場(chǎng)景的RC框架結(jié)構(gòu)余震倒塌易損性分析。采用三類(lèi)方法來(lái)模擬結(jié)構(gòu)主震損傷場(chǎng)景,包括:Pushover方法、一次時(shí)程分析和多次時(shí)程分析方法。采用上述三種方法對(duì)結(jié)構(gòu)施加不同等級(jí)的主震損傷,進(jìn)而對(duì)主震損傷結(jié)構(gòu)進(jìn)行余震倒塌易損性分析。通過(guò)對(duì)比不同主震損傷場(chǎng)景對(duì)應(yīng)的余震倒塌易損性分析結(jié)果進(jìn)行對(duì)比,研究主震損傷場(chǎng)景對(duì)余震倒塌易損性的影響。(3)開(kāi)展考慮余震譜形的RC框架結(jié)構(gòu)倒塌易損性分析。根據(jù)本文所選擇的余震記錄譜形的大小對(duì)本文已獲得的余震倒塌易損性分析結(jié)果進(jìn)行分類(lèi),分析余震譜形對(duì)余震倒塌易損性的影響。進(jìn)一步針對(duì)目標(biāo)譜形參數(shù)ε為±2、±1和0的情況,對(duì)結(jié)構(gòu)進(jìn)行余震倒塌易損性的修正。
[Abstract]:Historical seismic records show that a major earthquake is usually accompanied by multiple aftershocks. After the structure is damaged by the main earthquake, the possibility of collapse under aftershock is greatly increased. However, the existing design codes and related research are insufficient to evaluate the anti-aftershock collapse capacity of the main earthquake damage structure. Therefore, taking a four-story and eight-story reinforced concrete frame structure as the research object, considering the influence of different main earthquake damage scenarios and aftershock spectra, the vulnerability of aftershock collapse of the main earthquake damage structure is deeply studied in this paper. The main contents are as follows: (1) the influence of the number and intensity of aftershocks on the seismic response of RC frame structure is studied. The maximum inter-layer displacement angle, the maximum vertex displacement and the improved Park-Ang damage index are used as the response parameters of the structure respectively, and a group of main aftershocks with multiple aftershocks are selected as the input. The main aftershocks with a large magnitude and a primary aftershock are selected. The response of the structure under the action of multiple aftershocks is compared with the response of the structure under the action of a primary aftershock, and the effects of incremental damage of the structure are compared. The relationship between the main aftershock PGA and the Arias strength and the incremental damage of the structure is further considered. The influence of aftershock strength on incremental damage of structure under the action of main aftershock sequence is preliminarily analyzed. (2) the vulnerability analysis of aftershock collapse of RC frame structure considering the main earthquake damage scenario is carried out. Three kinds of methods are used to simulate the main earthquake damage scene, including Pushover method, one-time history analysis and multiple time-history analysis methods. The above three methods are used to apply different levels of main earthquake damage to the structure, and then the vulnerability analysis of the aftershock collapse of the main earthquake damage structure is carried out. By comparing the vulnerability analysis results of aftershock collapse corresponding to different main earthquake damage scenarios, the influence of main earthquake damage scene on the vulnerability of aftershock collapse is studied. (3) the vulnerability analysis of RC frame structure considering aftershock spectrum is carried out. According to the spectral shape of the aftershock record selected in this paper, the vulnerability analysis results of the aftershock collapse obtained in this paper are classified, and the influence of the aftershock spectrum shape on the vulnerability of the aftershock collapse is analyzed. In view of the target spectral parameters 蔚 being 鹵2, 鹵1 and 0, the vulnerability of aftershock collapse of the structure is modified.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TU375.4;TU312.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 于曉輝;呂大剛;肖寒;;主余震序列型地震動(dòng)的增量損傷譜研究[J];工程力學(xué);2017年03期

2 周知;錢(qián)江;黃維;;基于修正的Park-Ang損傷模型在鋼構(gòu)件中的應(yīng)用[J];建筑結(jié)構(gòu)學(xué)報(bào);2016年S1期

3 徐駿飛;陳雋;丁國(guó);;基于IDA的主余震序列作用下RC框架易損性分析與生命周期費(fèi)用評(píng)估[J];地震工程與工程振動(dòng);2015年04期

4 朱瑞廣;呂大剛;李雁軍;于曉輝;陳國(guó)棟;;考慮余震影響的非延性RC框架模型振動(dòng)臺(tái)試驗(yàn)[J];地震工程與工程振動(dòng);2014年S1期

5 歐進(jìn)萍,何政,吳斌,邱法維;鋼筋混凝土結(jié)構(gòu)基于地震損傷性能的設(shè)計(jì)[J];地震工程與工程振動(dòng);1999年01期

6 鐘益村;王文基;田家驊;;鋼筋混凝土結(jié)構(gòu)房屋變形性能及容許變形指標(biāo)[J];建筑結(jié)構(gòu);1984年02期

相關(guān)碩士學(xué)位論文 前7條

1 陶靜;主余震序列作用下SDOF體系的增量損傷與抗倒塌能力研究[D];哈爾濱工業(yè)大學(xué);2016年

2 李瑜瑜;主余震地震動(dòng)作用下RC框架地震反應(yīng)及易損性分析[D];哈爾濱工業(yè)大學(xué);2014年

3 劉亭亭;基于非線性等效SDOF體系的RC框架結(jié)構(gòu)抗地震倒塌能力分析[D];哈爾濱工業(yè)大學(xué);2014年

4 武坤芳;基于主余震序列型地震動(dòng)的RC框架結(jié)構(gòu)易損性分析及應(yīng)用[D];哈爾濱工業(yè)大學(xué);2012年

5 李文博;基于IDA方法的RC框架結(jié)構(gòu)地震易損性分析研究[D];西安建筑科技大學(xué);2012年

6 萬(wàn)正東;RC框架結(jié)構(gòu)基于概率損傷模型的地震易損性與風(fēng)險(xiǎn)分析[D];哈爾濱工業(yè)大學(xué);2009年

7 趙金寶;主余震作用下鋼筋混凝土框架結(jié)構(gòu)的破壞評(píng)估[D];中國(guó)地震局地球物理研究所;2005年

，

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