本文關(guān)鍵詞： 張弦結(jié)構(gòu) 縱向聯(lián)系桁架 數(shù)值分析 連續(xù)倒塌 關(guān)鍵構(gòu)件 設(shè)計(jì)方法　出處：《建筑結(jié)構(gòu)學(xué)報(bào)》2013年03期 　論文類型：期刊論文

【摘要】：通過對(duì)天津梅江會(huì)展中心張弦桁架移除關(guān)鍵構(gòu)件后的殘余結(jié)構(gòu)的承載力分析,得到張弦結(jié)構(gòu)的支座、邊索和邊跨桁架支座處下弦桿等關(guān)鍵構(gòu)件的破壞對(duì)結(jié)構(gòu)承載力影響最大;為了模擬桿件失效前靜力荷載產(chǎn)生的初始變形對(duì)結(jié)構(gòu)連續(xù)倒塌的影響,采用考慮初始變形的全動(dòng)力等效荷載瞬時(shí)卸載法模擬桿件失效。對(duì)支座、邊索和邊跨桁架支座處下弦桿失效進(jìn)行連續(xù)倒塌動(dòng)力分析,研究了縱向聯(lián)系桁架對(duì)張弦結(jié)構(gòu)抗連續(xù)倒塌的作用,得到平面張弦桁架通過縱向聯(lián)系桁架組裝成一整體,其整體性隨著縱向聯(lián)系構(gòu)件抗彎剛度的增大而提高,共同作用效果明顯。在此基礎(chǔ)上,利用山墻的抗風(fēng)柱,將邊跨張弦桁架改變?yōu)槎嘀c(diǎn)支承的普通桁架,設(shè)計(jì)時(shí)該抗風(fēng)柱不僅承擔(dān)水平風(fēng)荷載,還承擔(dān)豎向荷載,從而提高結(jié)構(gòu)的抗連續(xù)倒塌能力。并根據(jù)該工程的特點(diǎn)提出集桁架支座、張拉端(錨固端)和桁架下弦管于一體的鑄鋼節(jié)點(diǎn)構(gòu)造,不僅滿足建筑要求,還使得該處節(jié)點(diǎn)承載力大大加強(qiáng),可供相關(guān)工程參考。
[Abstract]:Based on the analysis of the bearing capacity of the residual structure of Zhang Xian truss of Tianjin Meijiang Convention and Exhibition Center after removing the key members, it is concluded that the failure of the supporting, the side cable and the lower chord of the edge span truss bearing have the greatest influence on the bearing capacity of the structure. In order to simulate the effect of the initial deformation caused by static load on the continuous collapse of the structure before the failure of the member, the full dynamic equivalent load instantaneous unloading method considering the initial deformation was used to simulate the failure of the member. The continuous collapse dynamic analysis of string failure at the side cable and side span truss support is carried out, and the effect of longitudinal connection truss on the continuous collapse of Zhang Xian structure is studied. It is obtained that the planar Zhang Xian truss is assembled into a whole by longitudinal connection truss. With the increase of flexural stiffness of longitudinal connection members, its integrity is improved, and the joint effect is obvious. On this basis, the side span Zhang Xian truss is changed into a common truss supported by multiple supports by using the wind resistant column of the gable wall. In the design, the anti-wind column bears not only horizontal wind load but also vertical load, so as to improve the continuous collapse resistance of the structure. According to the characteristics of the project, a truss bearing is proposed. The construction of cast steel joint with tension end (anchor end) and truss lower chord tube can not only meet the requirements of construction, but also strengthen the bearing capacity of the joint, which can be used as a reference for relevant projects.
【作者單位】： 東南大學(xué)混凝土及預(yù)應(yīng)力混凝土結(jié)構(gòu)教育部重點(diǎn)實(shí)驗(yàn)室;中冶建筑研究總院有限公司;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(50478075)
【分類號(hào)】：TU393.3;TU312

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本文編號(hào)：1519516