- 摘 要
-
(1 中國建筑設(shè)計研究院有限公司， 北京 100044； 2 美國H+P建筑結(jié)構(gòu)事務(wù)所，芝加哥 60654)
［摘要］ 銀川綠地中心301m雙塔地處高烈度區(qū)，且風(fēng)荷載較大，采用框架-核心筒+2道伸臂桁架/環(huán)帶桁架結(jié)構(gòu)體系，準(zhǔn)確取用結(jié)構(gòu)計算參數(shù)，并采取多種抗震加強(qiáng)措施。計算結(jié)果表明，在地震與風(fēng)荷載作用下，塔樓可以達(dá)到預(yù)期的性能目標(biāo)；通過厚板多次微彎工藝并結(jié)合焊接工藝實現(xiàn)了伸臂桁架與核心筒角部復(fù)雜節(jié)點的加工制作，避免了采用大型鑄鋼節(jié)點；塔樓下部樓層采用鋼板組合剪力墻，通過配置長短栓釘，避免了鋼筋孔造成的鋼板削弱，提高了厚剪力墻的整體性；在中震作用下，控制鋼板組合剪力墻軸拉比不大于0.6，在滿足構(gòu)件拉剪承載力的同時，可以有效減少鋼材用量；對受力集中的建筑門洞與結(jié)構(gòu)洞口，采用多連梁技術(shù)可以有效地解決普通連梁在地震作用下剪壓比不足的問題。
［關(guān)鍵詞］銀川綠地中心;超高層雙塔結(jié)構(gòu)；框架核心筒；伸臂桁架節(jié)點；鋼板組合剪力墻；多連梁;抗震性能
中圖分類號：TU973 文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2021)17-0034-09
Super high-rise twin-tower structure design of Yinchuan Greenland Center
FAN Zhong1, WANG Yihua1, LIU Xuelin1, WANG Jinjin1, ZHANG Yu1, XING Chao1, HU Chunyang1, ZHAO Yantong2
(1 China Architecture Design & Research Institute Co., Ltd., Beijing 100044， China；2 Halvorson and Partners， Chicago 60654, USA)
Abstract: The 301meter-high twin towers of Yinchuan Greenland Center are located in a high intensity seismic area, and the wind load of there is relatively high. A frame-core tube structure with two-outrigger truss/ring belt truss system was adopted, structural calculation parameters were accurately taken, and various seismic strengthening measures were adopted. The calculation results show that the towers can reach the expected performance target under earthquake and wind load. Through the thick plate multiple micro-bending process, the welding process was used to realize the manufacture of the complex joints of the outrigger truss and the corner of the RC core tube, avoiding the use of large cast steel joints. The lower stories of the towers adopt the steel plate composite shear walls, and the long and short studs were arranged to avoid the weakening of the steel plate caused by the reinforcement holes, and the integrity of the thick shear wall were improved. Under moderate earthquakes, the axial tenson ratio of the steel plate composite shear wall was controlled not to be greater than 0.6, which can effectively reduce the amount of steel while meeting the tensile-shear bearing capacity of the members. For building door openings and structural openings where the forces concentrate, the use of multi-coupling beam technology can effectively solve the problem of insufficient shear-compression ratio of ordinary coupling beams under earthquakes.
Keywords:Yinchuan Greenland Center; super high-rise twin-tower structure； frame-core tube； cantilever truss joint； steel plate composite shear wall； multi-coupling beam; seismic performance
作者簡介：范重，全國工程勘察設(shè)計大師,博士，教授級高級工程師，Email:fanz@cadg.cn。
