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(北京工業(yè)大學(xué)建筑工程學(xué)院 100022)
【提要】 以2008年奧運(yùn)會(huì)羽毛球比賽館張弦穹頂結(jié)構(gòu)為例，對(duì)張弦穹頂和單層網(wǎng)殼進(jìn)行了內(nèi)力、節(jié)點(diǎn)位移、特征值屈曲和非線性屈曲的荷載位移平衡路徑的跟蹤分析，闡述了張弦穹頂結(jié)構(gòu)的優(yōu)越性。對(duì)聯(lián)方型、肋環(huán)型、肋環(huán)斜桿型張弦穹頂?shù)姆治霰容^表明，聯(lián)方型網(wǎng)格經(jīng)濟(jì)合理，更適用于張弦穹頂結(jié)構(gòu)。分析了網(wǎng)格密度、矢跨比、撐桿長(zhǎng)度、初始缺陷、鋼索預(yù)應(yīng)力等設(shè)計(jì)參數(shù)的影響，得到了具有工程實(shí)用意義的結(jié)論。分別以網(wǎng)殼桿件內(nèi)力和節(jié)點(diǎn)位移為目標(biāo)函數(shù)編制了優(yōu)化程序，研究了鋼索合理預(yù)應(yīng)力度的確定方法。
【關(guān)鍵詞】 張弦穹頂 整體穩(wěn)定 初始缺陷 預(yù)應(yīng)力度 非線性屈曲特征值屈曲
Suspendome Optimal Design of Olympic Badminton Stadium Based on Integral Stability/
Zhang Ailin,Liu Xuechun(Civil Engineering Department of Beijing Institute of Technology,Beijing 100022,China)
Abstract:With the suspenddome of Olympic badminton stadium,analysis to suspenddome and single layer shell including force,displacement,eigenvalue buckling and nonlinear buckling is conducted separately,and the advantages of suspenddome are provided. The analysis of Lamella's,ribloop,ribloop tilted bar shell indicates that Lamella's shell is the most effective for suspenddome. The influence of density of net,risespan ratio,height of strut,initial defect,prestress of cable are analyzed,and some engineering valuable conclusion are drawn for practical design. Programs are developed with the axis force and joint displacement of upper dome as  object function respectively,and the effective method of prestress degree is developed.
Keywords:suspendome; integral stability; initial defect; prestress degree; eigenvalue buckling; nonlinear buckling
*國(guó)家自然科學(xué)基金資助項(xiàng)目(50278005)，北京市科委科技奧運(yùn)專項(xiàng)資助項(xiàng)目(Z0005191040111)。