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    衛(wèi)    東    （北京市建筑設(shè)計(jì)研究院 100045）

    沈世釗    （哈爾濱工業(yè)大學(xué)土木工程學(xué)院 150090）

[提要]  提出了一種新的實(shí)用薄膜結(jié)構(gòu)裁剪分析方法——分片展開法。該方法采用測(cè)地線對(duì)結(jié)構(gòu)曲面進(jìn)行劃分，用文中提出的平面映射法對(duì)各曲面膜片進(jìn)行平面展開計(jì)算，并引入回縮比系數(shù)以考慮膜內(nèi)預(yù)拉力的釋放和徐變影響的消除。編制了相應(yīng)的裁剪分析程序，并對(duì)該程序進(jìn)行了算例驗(yàn)證。
[關(guān)鍵詞]  薄膜結(jié)構(gòu)  裁剪分析  分片展開法  測(cè)地線

A new easier cutting pattern calculation method called pieces unfold method is brought forward. We suggest to divide structure's curved surface into several pieces by geodesic line, unfold these pieces with plan correspondence method, then release the prestress in membrane element and eliminate the creep affection. Based on the method introduced above, the cutting pattern calculating program is developed and its accuracy and adaptability are testified by numerical analyses.
Keywords: membrane structure; cuttlng patterns analysis; pieces unfold method; geodesic line