本文關(guān)鍵詞：基于風(fēng)險(xiǎn)分析的海洋平臺(tái)結(jié)構(gòu)魯棒性評(píng)價(jià)與控制　出處：《安全與環(huán)境學(xué)報(bào)》2016年04期 　論文類型：期刊論文

  更多相關(guān)文章： 安全工程 風(fēng)險(xiǎn)魯棒性 海洋平臺(tái)結(jié)構(gòu) 隨機(jī)模擬 魯棒性控制

【摘要】：針對(duì)海洋平臺(tái)服役周期內(nèi)突發(fā)致?lián)p事件"小概率,高風(fēng)險(xiǎn)"的非比例后果特性,綜合考慮常規(guī)疲勞退化與突發(fā)致?lián)p的耦合作用,定量分析了局部突發(fā)致?lián)p的直接后果及結(jié)構(gòu)倒塌失效的潛在間接后果。從風(fēng)險(xiǎn)分析理論的角度,提出海洋平臺(tái)結(jié)構(gòu)風(fēng)險(xiǎn)魯棒性指標(biāo),并基于Monte-Carlo隨機(jī)模擬,建立了風(fēng)險(xiǎn)魯棒性的評(píng)價(jià)方法及評(píng)價(jià)流程。通過(guò)相應(yīng)算例,分析海洋平臺(tái)結(jié)構(gòu)全壽命周期內(nèi)風(fēng)險(xiǎn)魯棒性指標(biāo)的動(dòng)態(tài)特征及影響因素,并討論了檢修行為對(duì)結(jié)構(gòu)魯棒性控制的作用。模擬示例結(jié)果表明,在平臺(tái)服役后期,初始損傷及疲勞退化對(duì)風(fēng)險(xiǎn)魯棒性指標(biāo)的影響愈加顯著,完好平臺(tái)結(jié)構(gòu)的風(fēng)險(xiǎn)魯棒性指標(biāo)明顯高于含初始損傷平臺(tái),至服役的第30年,兩種平臺(tái)的風(fēng)險(xiǎn)魯棒性指標(biāo)分別由1下降至0.913和0.67。同時(shí),4種不同突發(fā)事件單獨(dú)作用下的模擬結(jié)果表明,對(duì)風(fēng)險(xiǎn)魯棒性影響最為顯著的突發(fā)事件是爆炸,其后依次是船舶碰撞、突發(fā)火災(zāi)和重物墜落。突發(fā)事件發(fā)生后采取快修措施可有效提高其風(fēng)險(xiǎn)魯棒性指標(biāo),且為保證平臺(tái)結(jié)構(gòu)維持合理的風(fēng)險(xiǎn)魯棒性水平而采取"非完好維修"是更為經(jīng)濟(jì)可行的選擇。
[Abstract]:In view of the non-proportional consequences of "small probability and high risk" of sudden damage events in the service cycle of offshore platforms, the coupling effect of conventional fatigue degradation and sudden damage is considered comprehensively. The direct consequences of local sudden damage and the potential indirect consequences of structural collapse failure are quantitatively analyzed. From the point of view of risk analysis theory, the risk robustness index of offshore platform structure is proposed. Based on Monte-Carlo stochastic simulation, the evaluation method and flow chart of risk robustness are established. The dynamic characteristics and influencing factors of the risk robustness index of offshore platform structures during their life cycle are analyzed, and the effect of maintenance behavior on structural robustness control is discussed. The simulation results show that it is in the late service period of the platform. The impact of initial damage and fatigue degradation on the risk robustness index is more significant. The risk robustness index of the intact platform structure is significantly higher than that of the platform with initial damage until the 30th year of service. The risk robustness index of the two platforms decreased from 1 to 0.913 and 0.67 respectively. The most significant impact on risk robustness is explosion, followed by ship collision, sudden fire and weight fall. In order to maintain a reasonable level of risk robustness of platform structure, it is more economical and feasible to adopt "non-intact maintenance".
【作者單位】： 中國(guó)石油大學(xué)海洋油氣裝備與安全技術(shù)研究中心;中國(guó)石油大學(xué)(華東)儲(chǔ)運(yùn)與建筑工程學(xué)院;中國(guó)石油大學(xué)(華東)理學(xué)院;天津大學(xué)建筑工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51209218,51579246,51509184) 青島市應(yīng)用基礎(chǔ)研究計(jì)劃項(xiàng)目(青年專項(xiàng))(14-2-4-58-jch) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)(15CX05003A,15CX05065A)
【分類號(hào)】：P75
【正文快照】： 4天津大學(xué)建筑工程學(xué)院,天津300072)0引言海洋平臺(tái)結(jié)構(gòu)在長(zhǎng)期服役過(guò)程中可能會(huì)遭受各種突發(fā)致?lián)p事件[1-3],造成結(jié)構(gòu)局部破壞,并引發(fā)一連串失效反應(yīng),甚至導(dǎo)致平臺(tái)結(jié)構(gòu)整體的連續(xù)破壞、倒塌。歷史上曾發(fā)生多起平臺(tái)結(jié)構(gòu)的連續(xù)倒塌[4]事故,充分暴露了平臺(tái)結(jié)構(gòu)在抵抗初始局部破壞方，

本文編號(hào)：1361880