【摘要】：傳統(tǒng)的最大層間位移作為一個(gè)全局性的性能指標(biāo),超出給定的性能極限狀態(tài)閾值就不能映射構(gòu)件局部損傷狀態(tài)。本文基于能量平衡原理,將塑性能量耗散和塑性鉸的等效能相比得到累積塑性應(yīng)變,將累積塑性應(yīng)變這一反映局部損傷狀態(tài)的損傷指標(biāo)作為工程需求參數(shù),假定一系列累積塑性應(yīng)變閾值建立局部構(gòu)件的易損性曲線族。以傳統(tǒng)的最大層間位移作為反映全局性能水準(zhǔn)的工程需求參數(shù),建立結(jié)構(gòu)全局性能極限狀態(tài)下的易損性曲線。對比全局和局部易損性曲線,發(fā)現(xiàn)全局性能水準(zhǔn)和局部構(gòu)件損傷狀態(tài)之間存在良好的相關(guān)性,通過易損性曲線的吻合程度可獲得給定全局性能水準(zhǔn)相對應(yīng)的累積塑性應(yīng)變閾值。進(jìn)而也建立起全局性能指標(biāo)與局部損傷狀態(tài)的映射關(guān)系�；诶鄯e塑性應(yīng)變的機(jī)構(gòu)易損性分析是一種更精確的易損性分析方法。
[Abstract]:As a global performance index, the traditional maximum interstory displacement cannot map the local damage state of the component beyond the given threshold of the performance limit state. Based on the principle of energy balance, the cumulative plastic strain is obtained by comparing the plastic energy dissipation with the equivalent efficiency of plastic hinge, and the cumulative plastic strain, a damage index reflecting the local damage state, is taken as the engineering requirement parameter. A series of cumulative plastic strain thresholds are assumed to establish the vulnerability curve family of local members. Taking the traditional maximum interstory displacement as the engineering requirement parameter reflecting the global energy leveling, the vulnerability curve of the structure under the limit state of global energy is established. By comparing the global and local vulnerability curves, it is found that there is a good correlation between the global energy level and the damage state of local components, and the cumulative plastic strain threshold corresponding to the given global energy level can be obtained by the coincidence of the vulnerability curve. Furthermore, the mapping relationship between global performance index and local damage state is also established. The mechanism vulnerability analysis based on cumulative plastic strain is a more accurate method.
【作者單位】： 西北工業(yè)大學(xué)力學(xué)與土木建筑學(xué)院;
【基金】：國家自然科學(xué)基金(51278420) 西北工業(yè)大學(xué)研究生創(chuàng)意創(chuàng)新種子基金(Z2016094)資助項(xiàng)目
【分類號】：TU312.3

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