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（哈爾濱工業(yè)大學(xué)土木工程學(xué)院 150090）
【提要】 有計(jì)劃地對(duì)480余例實(shí)際尺寸的短程線型單層球面網(wǎng)殼進(jìn)行了雙重非線性全過(guò)程分析，求得了極限承載力，系統(tǒng)地考察了初始缺陷和荷載不對(duì)稱(chēng)分布等因素對(duì)網(wǎng)殼穩(wěn)定性能的影響，并重點(diǎn)討論了材料非線性對(duì)極限承載力的影響。通過(guò)大規(guī)模參數(shù)分析研究，較全面了解了短程線型單層球面網(wǎng)殼彈塑性穩(wěn)定性能；在短程線型網(wǎng)殼彈性極限承載力公式基礎(chǔ)上，利用塑性折減系數(shù)對(duì)其進(jìn)行修正，提出了短程線型單層球面網(wǎng)殼彈塑性極限穩(wěn)定承載力的實(shí)用計(jì)算公式。
【關(guān)鍵詞】 短程線 穩(wěn)定 極限承載力 彈塑性
ElasticPlastic Stability of Geodesic Latticed Domes/Cao Zhenggang，F(xiàn)an Feng，Shen Shizhao(School of Civil Engineering，Haerbin Institute of Technology，Haerbin 150090，China)
Abstract:A comprehensive parametric analysis of stability behaviours of geodesi
c latticed domes with various geometric parameters (span, member crosssection,
 etc.) has been carried out based upon accurate nonlinear completeprocess analy
sis. More than 480 examples of real latticed domes with initial imperfections and
 possible unsymmetrical action of loads are studied systematically, and the plen
tiful results obtained are thoroughly studied. As a result, practical formulas f
or predicting critical loads of real latticed dome structure, which are very sim
ple for application but based on “accurate” theory, are revised.
Keywords:geodesic latticed domes； stability； critical loads； elasticplastic