在地震作用下初始缺陷對(duì)網(wǎng)殼結(jié)構(gòu)動(dòng)力穩(wěn)定性能的影響
葉繼紅 沈祖炎
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葉繼紅 （哈爾濱建筑大學(xué) 150008）沈祖炎 （同濟(jì)大學(xué) 上海 200092）
[提要] 沿用靜力穩(wěn)定分析中的“一致缺陷模態(tài)法”，通過單層球殼及單層鞍殼兩個(gè)算例，分析了網(wǎng)殼結(jié)構(gòu)分別在豎向地震和水平地震作用下，初始缺陷對(duì)其動(dòng)力穩(wěn)定性能的影響。
[關(guān)鍵詞] 初始缺陷 地震作用 動(dòng)力穩(wěn)定分析Based on the method for imperfection analysis just as used in the analysis of static stability, the effect of initial imperfection on the large displacement stability behavior of reticulated structures subjected to up-and-down earthquake and horizontal earthquake excitation is studied. Through two examples of a single-layer latticed dome and a single-layer latticed saddle shell, some conclusions are obtained finally.
Keywords: initial imperfection; earthquake excitation; analysis; dynamic stability
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