貴陽奧體中心主體育場罩篷鋼結(jié)構(gòu)抗震性能化設(shè)計研究
葛家琪，黃季陽，王樹，劉鑫剛，張國軍，宋海巖
- 摘 要
-
(中國航空規(guī)劃建設(shè)發(fā)展有限公司，北京 100120)［摘要］貴陽奧體中心主體育場罩篷采用了預(yù)應(yīng)力平面桁架斜交網(wǎng)格結(jié)構(gòu)體系，最大懸挑49m。首先確定了抗震性能化設(shè)計目標，然后分別采用振型分解反應(yīng)譜法、彈性動力時程分析方法和彈塑性動力時程分析方法對該工程進行抗震性能研究。針對單獨鋼筋混凝土看臺模型、鋼結(jié)構(gòu)模型以及結(jié)構(gòu)整體模型三種計算模型，對結(jié)構(gòu)自振特性、構(gòu)件應(yīng)力比、結(jié)構(gòu)位移、塑性鉸分布與損壞程度等性能進行深入量化分析與設(shè)計。另外針對上下部整體計算模型分別按一致激勵和多點激勵進行動力時程反應(yīng)計算。計算表明：采用單獨罩篷鋼結(jié)構(gòu)模型進行抗震設(shè)計存在不安全因素，必須考慮上下部共同工作的整體模型；多點激勵法計算基底總剪力小于一致激勵法計算結(jié)果，采用一致激勵法進行設(shè)計能保證結(jié)構(gòu)安全性；在罕遇地震作用下，看臺鋼筋混凝土結(jié)構(gòu)剛度的退化對上部鋼結(jié)構(gòu)抗震有利。通過上述系列分析研究，實現(xiàn)了抗震安全性能化設(shè)計目標。［關(guān)鍵詞］抗震性能化設(shè)計；一致激勵法；多點激勵法；彈塑性時程分析Seismic performance design and research on the steel roof of the main stadium in Guiyang Olympic Sports CenterGe Jiaqi, Huang Jiyang, Wang Shu, Liu Xingang, Zhang Guojun, Song Haiyan(China Aviation Planning and Construction Development Co., Ltd., Beijing 100120, China)Abstract:The structural system of prestressed oblique in-plane truss lattice with maximum 49m cantilever was employed for the main stadium roof in Guiyang Olympic Sports Center. The seismic performance design objective was determined, and then the seismic performance studies were conducted by response spectrum analysis, elastic dynamic time-history analysis and elasto-plastic dynamic time-history analysis respectively. The numerical analysis and design were performed to obtain the structural natural frequency of vibration, member stress ratio, displacement, plastic hinge distribution, and damage level based on different three models, which are only reinforced concrete stand, only steel roof and combined stand and roof. The single points motivation and multiple points motivation were utilized to perform dynamic time-history analysis for the combined model respectively. As shown from analyses, the co-ordinate work of the combined model shall be considered for the safety of the structure. The results show the structural safety can be ensured by using single points motivation method. Besides, under ultimate seismic load, the structural steel roof benefits from the stiffness degradation from reinforced concrete stand. Through above series of research, the seismic performance design objective was realized.Keywords:seismic performance design; single points motivation; multiple points motivation; elasto-plastic dynamic time-history analysis貴州省科技廳工業(yè)攻關(guān)項目(［2010］3002),貴陽市科技局工業(yè)攻關(guān)項目［2010］。作者簡介：葛家琪,研究員,一級注冊結(jié)構(gòu)工程師，總結(jié)構(gòu)師，Email:capdi.gssd@vip.163.com。參考文獻［1］葛家琪，張國軍，王樹，等. 貴陽體育場體外預(yù)應(yīng)力大懸挑鋼管桁架結(jié)構(gòu)設(shè)計研究［J］.建筑結(jié)構(gòu), 2009,39(10): 47-53.［2］謝禮立，翟長海. 最不利設(shè)計地震動研究［J］. 地震學(xué)報，2003，25(3)：250-261.［3］GB50011—2001建筑抗震設(shè)計規(guī)范［S］.2008版.北京：中國建筑工業(yè)出版社，2008.［4］王樹，葛家琪，張慶亮，等. 大劇院上下結(jié)構(gòu)共同工作對鋼屋蓋抗震性能影響分析［J］. 建筑結(jié)構(gòu)，2008，38(12)：7-10.
