發(fā)布時間：2018-02-11 06:31

  本文關(guān)鍵詞： 矩形底面 單層球面網(wǎng)殼 靜力穩(wěn)定性 等代剛度 初始幾何缺陷　出處：《遼寧工程技術(shù)大學(xué)學(xué)報(自然科學(xué)版)》2016年12期 　論文類型：期刊論文

【摘要】：針對底面為矩形的球面網(wǎng)殼結(jié)構(gòu),分析了常見三種網(wǎng)格形式的非線性穩(wěn)定性能,選出其中性能較合理的一種網(wǎng)格形式,通過大規(guī)模參數(shù)化分析,較為系統(tǒng)地研究了矩形平面單層三向球面網(wǎng)殼結(jié)構(gòu)的穩(wěn)定性能,并給出了其極限承載力擬合公式.研究結(jié)果表明:常見網(wǎng)格形式中三向網(wǎng)格矩形底面球面網(wǎng)殼的穩(wěn)定性能最優(yōu);極限載荷與結(jié)構(gòu)等代剛度呈線性關(guān)系;初始幾何缺陷對網(wǎng)殼極限載荷影響非常明顯,當(dāng)初始缺陷值取L/300時,極限載荷降低率在53.5%~65.8%之間;結(jié)構(gòu)對載荷不對稱分布并不敏感;立體桁架能夠顯著提高結(jié)構(gòu)的極限承載能力.
[Abstract]:According to the structure of spherical reticulated shell with rectangular bottom surface , the paper analyzes the nonlinear stability of three kinds of grid forms , and selects one kind of grid form which is reasonable in performance . By means of large - scale parametric analysis , the stability performance of single - layer three - way spherical reticulated shell of rectangular plane is studied systematically . The results show that the limit load and the structure are linear ; and when the initial defect value is L / 300 , the limit load reduction rate is between 53.5 % and 65.8 % , and the structure has no sensitivity to the load asymmetry distribution . The three - dimensional truss can obviously improve the ultimate bearing capacity of the structure .

【作者單位】： 湖南大學(xué)土木工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(51178176) 教育部博士點基金項目(20120161110019)
【分類號】：TU399
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本文編號：1502414