高層斜交網(wǎng)格筒結(jié)構(gòu)體系剪力滯后效應(yīng)研究*
史慶軒，任浩，戎翀
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（西安建筑科技大學(xué)土木工程學(xué)院， 西安 710055）
［摘要］利用SAP2000建立不同幾何參數(shù)的高層斜交網(wǎng)格筒結(jié)構(gòu)模型，在水平風(fēng)荷載作用下對其進(jìn)行彈性分析。介紹了高層斜交網(wǎng)格筒結(jié)構(gòu)的剪力滯后現(xiàn)象與基本特點(diǎn)，研究了高層斜交網(wǎng)格筒結(jié)構(gòu)在水平荷載作用下剪力滯后效應(yīng)的產(chǎn)生機(jī)理，并與框筒結(jié)構(gòu)的剪力滯后效應(yīng)進(jìn)行對比。分析了斜柱角度、主環(huán)梁跨高比、結(jié)構(gòu)高寬比、結(jié)構(gòu)長寬比以及有無角柱對高層斜交網(wǎng)格筒結(jié)構(gòu)剪力滯后效應(yīng)的影響。結(jié)果表明：與框筒結(jié)構(gòu)相比，斜交網(wǎng)格筒結(jié)構(gòu)剪力滯后效應(yīng)較小；在側(cè)向剛度最優(yōu)區(qū)間內(nèi)斜交網(wǎng)格筒結(jié)構(gòu)底層剪力滯比隨斜柱角度的增大而增大，當(dāng)斜柱角度超過約80°時(shí)，隨著斜柱角度的增加底層剪力滯比迅速增大；斜交網(wǎng)格筒結(jié)構(gòu)高寬比越大，結(jié)構(gòu)底層剪力滯比越??；斜交網(wǎng)格筒結(jié)構(gòu)長寬比越大，結(jié)構(gòu)底層剪力滯比越大，剪力滯后效應(yīng)越明顯。［關(guān)鍵詞］斜交網(wǎng)格筒; 剪力滯后效應(yīng); 節(jié)點(diǎn)力; 剪力滯比中圖分類號：TU355 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號：1002-848X(2016)04-0001-07
Research of shear lag effect on high-rise diagrid tube structural systemShi Qingxuan, Ren Hao, Rong Chong(School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China)Abstract:By SAP2000, the models of high-rise diagrid tube structure with different geometric parameters were built, and elastic analysis was carried out on these models under the horizontal wind loads. The phenomena and basic characteristics of the shear lag effect of the high-rise diagrid tube structure were introduced. The emergence mechanism of the shear lag effect of the high-rise diagrid tube structure under horizontal loads was studied and the effect was compared with that of a framed tube structure. The influences of angle of inclined column, span-height ratio of ring beam, aspect ratio of the structure, length to width ratio of the structure and existence of corner columns on shear lag effect of the high-rise diagrid tube structure were studied. The results show that the shear lag effect of diagrid tube structure is smaller than that of the framed tube structure. The shear lag ratio at lower layers increases with the increase of the angle of inclined column in optimal lateral stiffness space. When the inclined angle of column is more than about 80°, the shear lag ratio at lower layers increases rapidly with the increase of the angle of inclined column. The shear lag ratio at lower layers increases with the increase of the aspect ratio of the structure, which shows an obvious shear lag effect.Keywords:diagrid tube; shear lag effect; nodal force; shear lag ratio
*國家自然科學(xué)基金資助項(xiàng)目（51478382, 51178380）,教育部長江學(xué)者和創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃（IRT13089）。作者簡介：史慶軒，博士，教授，博士生導(dǎo)師，Email:qingxuanshi@sina.com。
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