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（北京工業(yè)大學(xué)建筑工程學(xué)院， 北京 100124）
［摘要］設(shè)計(jì)了跨度為6m的較為精細(xì)的Geiger型索穹頂結(jié)構(gòu)模型，對模型結(jié)構(gòu)進(jìn)行靜力加載試驗(yàn)，研究結(jié)構(gòu)在滿跨對稱加載及半跨非對稱加載兩種不同荷載情況下的力學(xué)性能，得到了索穹頂結(jié)構(gòu)桿件內(nèi)力和節(jié)點(diǎn)位移的變化規(guī)律。試驗(yàn)結(jié)果表明，不同荷載工況下，隨著荷載的增大，外環(huán)索、外斜索的索力及外撐桿軸力逐漸增大，脊索索力逐漸減小或略有減小，增加的荷載主要由外環(huán)索、外斜索及外撐桿承擔(dān)；同一荷載等級下，半跨非對稱加載引起的節(jié)點(diǎn)豎向位移遠(yuǎn)大于滿跨對稱加載引起的豎向位移。
［關(guān)鍵詞］索穹頂結(jié)構(gòu)； 靜力試驗(yàn)； 力學(xué)性能
中圖分類號：TU393文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2018)23-0108-05
Experimental study on static behavior of Geiger-type cable dome structure model
Zhang Weijing, He Jing
(College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China)
Abstract:In order to study the mechanical behavior of Geiger-type cable dome structure under full-span symmetrical load and half-span asymmetrical load, a Geiger-type cable dome structure model with span of 6m was designed and tested in static loading experiment. The variation law of internal forces and joint displacement of the cable dome structure were obtained. The results show that under different load conditions, as the load increases, the cable force of the outer ring cable and the outer inclined cable and axial force of the outer strut gradually increase, while the ridge cable force gradually decreases or slightly decreases. The increased load is mainly borne by the outer ring cable, the outer inclined cable and the outer strut. Under the same load level, the vertical joint displacement caused by half-span asymmetrical load is much larger than that caused by full-span symmetrical load.
Keywords:cable dome structure; static experiment; mechanical property
*國家自然科學(xué)基金面上項(xiàng)目（51178009），北京市教委科技計(jì)劃重點(diǎn)項(xiàng)目(KZ201310005008)。
作者簡介：張微敬，博士，教授，Email: zhangweijing@bjut.edu.cn。
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