884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

    曹資  薛素鐸  劉景園
    （北京工業(yè)大學(xué)土木系  100022）

[提要]  本文充分考慮了懸索結(jié)構(gòu)大撓度變形幾何非線(xiàn)性反應(yīng)特征，在動(dòng)力反應(yīng)有限元理論分析中完善了索單元?jiǎng)偠群蛿M荷載項(xiàng)表達(dá)式，優(yōu)化了計(jì)算方法。對(duì)與動(dòng)力分析直接相關(guān)的索網(wǎng)阻尼特性及其對(duì)地震反應(yīng)影響做了深入研究，并給出了常見(jiàn)索網(wǎng)屋蓋結(jié)構(gòu)地震反應(yīng)及主要參數(shù)影響規(guī)律。在以上研究基礎(chǔ)上，對(duì)懸索結(jié)構(gòu)地震反應(yīng)分析與設(shè)計(jì)提出幾點(diǎn)新建議。
[關(guān)鍵詞]  懸索結(jié)構(gòu) 幾何非線(xiàn)性 地震反應(yīng)  阻尼特性

The finite element analysis method of dynamic response for cable suspended structures was further improved in this paper. The geometrically nonlinear characteristic is fully taken into account in the derivation of expressions of the stiffness matrix for a cable element and the pseudo loading vector. The damping behavior and the influense of parameters on seismic response of cable networkes were made a thorough investigation and study.Some useful conclusions for aseismlc analysis were given.
Keywords: suspended cable  structure; geometrical  nonlinearity; seismic  response; damping charac-
teristics