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王小盾，孔翠妍，陳志華，牛犇，孫濤

（天津大學(xué)建筑工程學(xué)院， 天津 300072）

［摘要］天津文化中心大劇院屋蓋由于建筑方面的要求，部分懸挑桁架僅與巨型桁架連接，缺少向內(nèi)延伸的桁架，使得巨型桁架承受巨大的扭矩，針對(duì)這種情況，設(shè)計(jì)采用目前國(guó)內(nèi)甚少的覆蓋波紋鋼板的巨型桁架，利用鋼板的蒙皮效應(yīng)來抗扭。簡(jiǎn)述了蒙皮效應(yīng)的基本概念，論述了鋼板加強(qiáng)桁架的蒙皮方法的設(shè)計(jì)概念，提出了分析方法，進(jìn)而針對(duì)無板桁架、平板桁架和波紋板桁架3種桁架的受力性能進(jìn)行了對(duì)比分析，得到了桁架位移、桁架梁?jiǎn)卧獞?yīng)力和桿單元應(yīng)力的不同結(jié)果。明確了覆蓋鋼板的桁架能較好地改善結(jié)構(gòu)的性能，提高承載能力。發(fā)現(xiàn)平板桁架桿件應(yīng)力要小于波紋板桁架的桿件應(yīng)力，但波紋板變形均勻，能夠較好地避免鋼板局部變形現(xiàn)象的出現(xiàn)。

［關(guān)鍵詞］抗扭桁架； 蒙皮效應(yīng)； 無板桁架； 平板桁架； 波紋板桁架

中圖分類號(hào)：TU3933，TU3234文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002848X(2013)06001004

Analysis on stressed skin diaphragm on torsion truss of Tianjin Grand Theater

in Tianjin Cultural Center

Wang Xiaodun， Kong Cuiyan， Chen Zhihua， Niu Ben， Sun Tao

（School of Civil Engineering, Tianjin University， Tianjin 300072， China）

Abstract:Because of the architectural requirement, some cantilever trusses of Tianjin Grand Theater are just connected with huge trusses without the extension trusses. Consequently, the huge trusses should be designed to bear the torque. Huge truss covered with corrugated plates which is seldom applied before is designed. The stressed skin diaphragm was utilized to bear the torque. The basic concept of stressed skin diaphragm was stated and the method of stressed skin diaphragm on torsion truss was put forward. By the comparison among truss without steel plates, truss with flat steel plates and the truss with corrugated steel plates, the displacement and internal force of the structure were analyzed. The behavior of the structure can be improved when the thin steel plates covered the truss. Even though the internal force of truss with flat steel plates is lower than that with corrugated steel plates, the corrugated steel plates with homogeneous deformation can avoid the local deformation.

Keywords:torsion trussed； stressed skin diaphragm； truss without steel plate； truss with flat steel plate； truss with corrugated steel plate

*天津市科技支撐計(jì)劃重大項(xiàng)目(11ZCZDSF04800)。

通訊作者：陳志華，教授，博士生導(dǎo)師，Email：zhchen@tju.edu.cn。

參考文獻(xiàn)

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