工业建筑综合吊挂体系抗震性能研究
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摘要
采用有限元模型分析综合吊挂体系抗震性能,根据模态分析结果得出抗侧移构件布置方法,针对体系特点采用斜拉杆抗侧移构件。分析斜拉杆按不同间距布置时,综合吊挂体系自振周期、构件应力、整体变形的规律。结果表明,通过增加斜拉杆抗侧移构件可有效改善综合吊挂体系的抗震性能,提高施工检修舒适度,并得到综合吊挂体系合理的布置方案。在桥架交叉区域、角部区域、分布密集区域应增加斜拉杆抗侧移构件密度,缺乏侧向约束的大跨度桥架应采用四面十字交叉布置法,桥架平面内与主体结构相交叉的关键位置增加部分平面内固定点,经过优化的综合吊挂体系可满足地震下侧向变形控制要求。
The seismic performance of the composite suspension structure is analyzed by using finite element software SAP2000.According to the results of modal analysis,the layout method of the lateral force- resisting members is obtained. The vibration period of the composite suspension structure,the cross- section stress,and the overall deformation are investigated by analyzing the different spacing of the lateral resistance members. The simulation results show that the seismic performance of composite suspension structure and the comfort of construction and maintenance can be effectively improved by increasing the lateral force- resisting members.Meanwhile,the reasonable layout of composite suspension structure is obtained. By analysis,it is found that the density of lateral restraint members should be increased in the bridge cross area,corner region,and dense region of distribution. All cross layout method should be adopted in long- span bridge,which lacks of lateral restraint member. The cross position of bridge and main structure should be fixed. The optimized composite suspension structure can meet the requirements of seismic lateral deformation.
The seismic performance of the composite suspension structure is analyzed by using finite element software SAP2000.According to the results of modal analysis,the layout method of the lateral force- resisting members is obtained. The vibration period of the composite suspension structure,the cross- section stress,and the overall deformation are investigated by analyzing the different spacing of the lateral resistance members. The simulation results show that the seismic performance of composite suspension structure and the comfort of construction and maintenance can be effectively improved by increasing the lateral force- resisting members.Meanwhile,the reasonable layout of composite suspension structure is obtained. By analysis,it is found that the density of lateral restraint members should be increased in the bridge cross area,corner region,and dense region of distribution. All cross layout method should be adopted in long- span bridge,which lacks of lateral restraint member. The cross position of bridge and main structure should be fixed. The optimized composite suspension structure can meet the requirements of seismic lateral deformation.
引文
[1]GB50011-2010,建筑抗震设计规范[S]GB50011-2010,Code for Seismic Design of Buildings[S](in Chinese)
[2]杨维国,陈丹,潘多俊.不同结构体系对钢结构框架侧向刚度的影响[J].建筑科学与工程学报,2010,27(2):102~105Yang Wei-guo,Chen Dan,Pan Duo-jun.Effects of Different Structural Systems on Lateral Rigidity of Steel Structural Frames[J].Journal of Architecture and Civil Engineering,2010,27(2):102~105(in Chinese)
[3]彭观寿,高轩能,陈明华.支撑布置对钢框架结构抗侧刚度的影响[J].工业建筑,2008,38(5):83~87Peng Guan-shou,Gao Xuan-neng,Chen Ming-hua.Effects of Layout of Bracing on Lateral Stiffness of Steel Frames[J].Industrial Construction,2008,38(5):83~87(in Chinese)
[4]沈超明,陈硕,杭振园,唐柏鉴.拉索直径对预应力巨型支撑-钢框架结构抗侧性能的影响[J].工程抗震与加固改造,2013,35(1):30~34Shen Chao-ming,Chen Shuo,Hang Zhen-yuan,Tang Bai-jian.Influence of Cable Diameter on Lateral Resistance Performance of Prestressed-mega-brace-steel Frame Structure[J].Earthquake Resistant Engineering Retrofitting,2013,35(1):30~34(in Chinese)
[5]GB50017-2003,钢结构设计规范[S]GB50017-2003,Code for Design of Steel Structures[S](in Chinese)
[2]杨维国,陈丹,潘多俊.不同结构体系对钢结构框架侧向刚度的影响[J].建筑科学与工程学报,2010,27(2):102~105Yang Wei-guo,Chen Dan,Pan Duo-jun.Effects of Different Structural Systems on Lateral Rigidity of Steel Structural Frames[J].Journal of Architecture and Civil Engineering,2010,27(2):102~105(in Chinese)
[3]彭观寿,高轩能,陈明华.支撑布置对钢框架结构抗侧刚度的影响[J].工业建筑,2008,38(5):83~87Peng Guan-shou,Gao Xuan-neng,Chen Ming-hua.Effects of Layout of Bracing on Lateral Stiffness of Steel Frames[J].Industrial Construction,2008,38(5):83~87(in Chinese)
[4]沈超明,陈硕,杭振园,唐柏鉴.拉索直径对预应力巨型支撑-钢框架结构抗侧性能的影响[J].工程抗震与加固改造,2013,35(1):30~34Shen Chao-ming,Chen Shuo,Hang Zhen-yuan,Tang Bai-jian.Influence of Cable Diameter on Lateral Resistance Performance of Prestressed-mega-brace-steel Frame Structure[J].Earthquake Resistant Engineering Retrofitting,2013,35(1):30~34(in Chinese)
[5]GB50017-2003,钢结构设计规范[S]GB50017-2003,Code for Design of Steel Structures[S](in Chinese)