884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

(1 中國(guó)航空規(guī)劃建設(shè)發(fā)展有限公司，北京 100120； 2 北京交通大學(xué)，北京 100044)
［摘要］貴陽體育中心主體育場(chǎng)49m大懸挑屋蓋，采用了上弦加體外預(yù)應(yīng)力的斜交鋼管桁架結(jié)構(gòu)體系。首先進(jìn)行了基于變形性能的結(jié)構(gòu)體系選型分析，針對(duì)大懸挑結(jié)構(gòu)，研究了結(jié)構(gòu)厚跨比、預(yù)起拱、預(yù)應(yīng)力分別對(duì)結(jié)構(gòu)體系穩(wěn)定、雙重延性性能的影響。研究結(jié)果表明，增加懸挑結(jié)構(gòu)厚度、施加預(yù)應(yīng)力均對(duì)結(jié)構(gòu)體系穩(wěn)定、雙重延性性能有較大提高，預(yù)起拱對(duì)結(jié)構(gòu)體系穩(wěn)定延性性能影響不大。對(duì)預(yù)應(yīng)力鋼結(jié)構(gòu)體系首次提出等效平衡荷載概念并計(jì)算分析，用直觀簡(jiǎn)單的等效平衡荷載概念解釋了預(yù)應(yīng)力體系的有效性；對(duì)預(yù)應(yīng)力索鋼轉(zhuǎn)換節(jié)點(diǎn)進(jìn)行了帶接觸單元的有限元分析，確定了預(yù)應(yīng)力損失及節(jié)點(diǎn)安全性；對(duì)延性性能較差的預(yù)應(yīng)力索單元的延性安全性能進(jìn)行分析確認(rèn)。
［關(guān)鍵詞］預(yù)應(yīng)力；大懸挑結(jié)構(gòu)；索-鋼轉(zhuǎn)換節(jié)點(diǎn)；等效平衡荷載；索單元延性設(shè)計(jì)
Research and analysis on large span external prestressed cantilever pipe truss of Guiyang Sports Center
Ge Jiaqi1, Zhang Guojun1, Wang Shu1, Huang Jiyang1,2, Zhao Ya2(1 China Aviation Planning and Construction Development Co., Ltd., Beijing 100120, China; 2 Beijing Jiaotong University, Beijing 100044, China)
Abstract:The cantilevered roof of the stadium with 49m long at Guiyang Sports Centre employs a structural steel system of the diagonal in-plane truss with the external prestressing along the top chord. The prior selection of structural system is conducted based on the performance of deformation. The impacts of the height-span ratio and the prestressing ratio on the structural overall stability performance are investigated, the results show that the effects are notable and nonlinear. The preliminary arch camber has slight impact on the overall stability. To identify the validity of the prestressed structural system, the equivalent balanced load is firstly presented on the prestressed structural system, the validity is interpreted by using the concept of that. The contact analysis is conducted for the transfer connection between the prestressed cable and the steel member to recognize the prestressing loss and the connection security, and to analyze and identify the ductility security of the prestressed cable with poor ductility performance.
Keywords:prestressed; large span cantilevered structure; cable-member transfer connection; equivalent prestressed balanced load; ductility design of cable
作者簡(jiǎn)介：葛家琪(1964-)，男，研究員，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:capdi.gssd@vip.163.com。
參考文獻(xiàn)
［1］葛家琪，等.2008奧運(yùn)會(huì)羽毛球館弦支穹頂結(jié)構(gòu)整體穩(wěn)定性能分析研究［J］.建筑結(jié)構(gòu)學(xué)報(bào)，2007，28(6)：22-30.
［2］陸賜麟，尹思明，劉錫良.現(xiàn)代預(yù)應(yīng)力鋼結(jié)構(gòu)［M］.北京：人民交通出版社，2003.
［3］王樹，張國(guó)軍，張愛林，等.2008奧運(yùn)會(huì)羽毛球館預(yù)應(yīng)力損失對(duì)結(jié)構(gòu)體系影響分析.2007，28(6)：45-51.
［4］GB50011—2001 建筑抗震設(shè)計(jì)規(guī)范［S］.北京：中國(guó)建筑工業(yè)出版社，2001.
［5］葛家琪，王樹，張國(guó)軍，等. 弦支穹頂預(yù)應(yīng)力鋼結(jié)構(gòu)體系索與拉桿延性性能設(shè)計(jì)研究［J］.建筑結(jié)構(gòu)學(xué)報(bào)，2007，28(6)：52-57.
［6］CECS212—2006 預(yù)應(yīng)力鋼結(jié)構(gòu)技術(shù)規(guī)程［S］.
［7］陳紹蕃.鋼結(jié)構(gòu)設(shè)計(jì)原理［M］.北京：科學(xué)出版社，2001.
［8］JGJ92—2004 無粘結(jié)預(yù)應(yīng)力混凝土結(jié)構(gòu)技術(shù)規(guī)程［S］.
［9］JGJ140—2004 預(yù)應(yīng)力混凝土結(jié)構(gòu)抗震設(shè)計(jì)規(guī)程［S］.
［10］楊霄.大跨度鋼結(jié)構(gòu)的穩(wěn)定性能和抗風(fēng)研究［D］.北京：中國(guó)航空工業(yè)規(guī)劃設(shè)計(jì)研究院，2007.
［11］鋼拉桿、纜索、索具產(chǎn)品技術(shù)資料［R］.中國(guó)巨力集團(tuán)，2006.
［12］謝禮立，翟長(zhǎng)海.最不利設(shè)計(jì)地震動(dòng)研究［J］.地震學(xué)報(bào)，2003，25(3)：250-261.
［13］張曼生. 玻璃幕墻索網(wǎng)次結(jié)構(gòu)與主結(jié)構(gòu)共同工作性能研究［D］.北京：北京交通大學(xué)，2008.