【摘要】：橋梁結(jié)構(gòu)的安全余度是指橋梁在個(gè)別構(gòu)件失效后的剩余承載能力。在橋梁結(jié)構(gòu)中任何構(gòu)件都不是單獨(dú)工作,而是始終處在相互作用影響下�，F(xiàn)代橋梁在運(yùn)營(yíng)階段部分構(gòu)件的損傷與破壞不可完全避免,為了保證部分構(gòu)件失效時(shí)結(jié)構(gòu)具有良好的抗連續(xù)倒塌能力以確保結(jié)構(gòu)的整體性,近年來(lái),歐美國(guó)家頒布了結(jié)構(gòu)抗連鎖倒塌設(shè)計(jì)標(biāo)準(zhǔn),以改善結(jié)構(gòu)的安全余度儲(chǔ)備。本研究通過(guò)對(duì)橋梁安全余度和抗連續(xù)倒塌研究發(fā)展?fàn)顩r的簡(jiǎn)要評(píng)述,介紹了結(jié)構(gòu)安全余度的定義,討論了橋梁安全余度和抗連續(xù)倒塌分析及評(píng)價(jià)的3類方法的演變和發(fā)展。判定性方法主要是基于橋梁的在荷載作用下的位移、承載力、能量、結(jié)構(gòu)構(gòu)件敏感性在橋梁破損發(fā)生后的變化確定結(jié)構(gòu)的安全儲(chǔ)備;結(jié)構(gòu)概率方法是基于可靠理論針對(duì)橋梁在特定荷載作用下的相對(duì)可靠指標(biāo)進(jìn)行分析以求得結(jié)構(gòu)的失效概率;基于風(fēng)險(xiǎn)分析方法主要是在確定了結(jié)構(gòu)面臨的風(fēng)險(xiǎn)以及相應(yīng)的結(jié)構(gòu)易損性后著重考慮了結(jié)構(gòu)倒塌對(duì)于經(jīng)濟(jì)、社會(huì)、環(huán)境等方面的綜合影響。指出了目前橋梁安全余度和抗連續(xù)倒塌分析的研究與應(yīng)用方面的缺陷,并提出有待進(jìn)一步研究的問(wèn)題。文中指出:判定性方法應(yīng)計(jì)入荷載作用形式對(duì)橋梁破壞過(guò)程的影響;對(duì)復(fù)雜結(jié)構(gòu)橋梁安全余度評(píng)定制訂出相應(yīng)的應(yīng)用標(biāo)準(zhǔn);完備關(guān)于連續(xù)倒塌各方面影響的相關(guān)預(yù)測(cè)數(shù)據(jù)作為基于風(fēng)險(xiǎn)分析方法分析的基礎(chǔ)。
[Abstract]:The safety redundancy of bridge structure refers to the residual bearing capacity of the bridge after the failure of individual components. In the bridge structure, any component does not work alone, but always under the influence of interaction. The damage and damage of some members of modern bridge are unavoidable in the operation stage. In order to ensure that the structure has good ability to resist continuous collapse and ensure the integrity of the structure when some members fail, in recent years, the damage and damage of some members of modern bridge are not completely avoided. European and American countries have issued design standards for structural chain collapse in order to improve structural safety reserves. Based on a brief review of the development of research on bridge safety redundancy and continuous collapse resistance, the definition of structural safety redundancy is introduced, and the evolution and development of three kinds of methods for bridge safety redundancy and continuous collapse analysis and evaluation are discussed. The judging method is mainly based on the displacement, bearing capacity, energy and sensitivity of the bridge under load to determine the safety reserve of the structure after the damage of the bridge. The structural probability method is based on the reliability theory to analyze the relative reliability index of the bridge under the specific load to obtain the failure probability of the structure. Based on the risk analysis method, the comprehensive effects of structural collapse on economy, society, environment and so on are considered after determining the risk of structure and the corresponding structural vulnerability. The defects in the research and application of the analysis of bridge safety redundancy and continuous collapse resistance are pointed out, and the problems to be further studied are put forward. In this paper, it is pointed out that the determinative method should take into account the influence of the form of load on the bridge failure process, and draw up the corresponding application standard for the evaluation of the safety redundancy of the bridge with complex structure. Complete prediction data about the impact of continuous collapse are used as the basis of risk analysis.
【作者單位】： 長(zhǎng)安大學(xué)公路學(xué)院;
【基金】：中國(guó)博士后科學(xué)基金項(xiàng)目(2015M572511)
【分類號(hào)】：U447

【相似文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前2條

1 安風(fēng)明;基于OpenSees的群樁體系橋梁連續(xù)倒塌分析[D];長(zhǎng)安大學(xué);2015年

2 成丕富;橋梁結(jié)構(gòu)連續(xù)倒塌研究[D];中南大學(xué);2012年

，

本文編號(hào)：2219457