天津體育中心射擊館雙向弦支梁結(jié)構(gòu)分析與設(shè)計*
安琦1，陳志華1，閆翔宇2，劉紅波1，肖驍1
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（1 天津大學(xué)建筑工程學(xué)院， 天津 300072； 2 天津大學(xué)建筑設(shè)計研究院， 天津 300073）［摘要］主要介紹天津體育中心射擊館屋蓋鋼結(jié)構(gòu)弦支梁的設(shè)計過程，重點闡述了三號屋蓋雙向弦支梁的設(shè)計和分析，包括雙向弦支梁的體系介紹及參數(shù)分析與選擇、屋蓋自振特性分析、地震作用下結(jié)構(gòu)強度驗算以及節(jié)點設(shè)計等。分析得到雙向弦支梁設(shè)計應(yīng)在參數(shù)分析的基礎(chǔ)上進行詳細(xì)對比，綜合考慮撐桿布置、垂跨比、預(yù)拉力、面外拉索等影響因素；對于直線形雙向弦支梁，垂跨比在一定范圍內(nèi)時，鋼梁最大應(yīng)力、最大豎向撓度及支座水平位移均隨垂跨比的增大而減??；鋼梁最大應(yīng)力及最大豎向撓度隨預(yù)拉力的增大線性減小，支座水平位移則相反；同時直線形弦支梁的撐桿下節(jié)點應(yīng)具有可靠的面外約束。［關(guān)鍵詞］雙向弦支梁結(jié)構(gòu); 參數(shù)分析; 自振特性; 預(yù)拉力中圖分類號：TU318，TU391 文獻標(biāo)識碼：A 文章編號：1002-848X(2015)05-0001-05Analysis and design on bidirectional beam string structure of Tianjin Sports Center Shooting GymnasiumAn Qi1, Chen Zhihua1, Yan Xiangyu2, Liu Hongbo1, Xiao Xiao1(1 School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2 Architectural Design and Research Institute of Tianjin University, Tianjin 300073, China )Abstract:The design of beam string structure for steel roof structure of Tianjin Sports Center Shooting Gymnasium was introduced, and the bidirectional beam string (BBS) structure of No.3 roof were the focuses, including structural system introduction, parametric analysis and selection, natural vibration characteristics, structural strength calculation under seismic action and joint design. The results show that the design of BBS should be compared in detail base on parametric analyses, while effect factors such as strut layout, sag-span ratio, pre-stress degree and out-of-plane cable should be overall considered. With regard to straight line BBS, the maximum stress, maximum vertical deflection and support horizontal displacement of the beam string decrease with the increase of sag-span ratio when the sag-span ratio within a certain range. The maximum stress and maximum vertical deflection of beam string decrease with the increase of pre-stress degree, while support horizontal displacement increases. The strut bottom node of straight line BBS should have reliable out-of-plane support.Keywords:bidirectional beam string structure; parametric analysis; natural vibration characteristics; pre-stress*國家自然科學(xué)基金項目（51478310）。通訊作者： 陳志華，教授，博士生導(dǎo)師，Email: zhchen@tju.edu.cn。參考文獻［1］陳志華，安琦，閆翔宇，等. 東亞運動會射擊館屋蓋鋼結(jié)構(gòu)體系簡介［J］. 工業(yè)建筑，2012，42（增刊）：483-488.［2］GB 50009—2001建筑結(jié)構(gòu)荷載規(guī)范［S］. 北京：中國建筑工業(yè)出版社，2001.［3］尹越，王秀泉，閆翔宇. 烏蘭浩特火車站站臺雨棚鋼結(jié)構(gòu)分析與設(shè)計［J］. 天津大學(xué)學(xué)報:自然科學(xué)與工程技術(shù)版，2014,47(增刊)：69-73.［4］GB 50017—2003鋼結(jié)構(gòu)設(shè)計規(guī)范［S］. 北京：中國計劃出版社，2003.［5］姜正榮, 王仕統(tǒng). 一維張弦梁結(jié)構(gòu)的穩(wěn)定分析［J］.空間結(jié)構(gòu)，2007,13(3):26-28.［6］GB 50011—2010建筑抗震設(shè)計規(guī)范［S］. 北京：中國建筑工業(yè)出版社，2010.
