新江湾城空中连廊振动分析
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摘要
新江湾空中连廊位于上海市杨浦区,主桥为异形环形钢结构,结构跨度大、桥面荷载复杂、梁高低,采用常规设计方法难以实现。设计时,参考国外规范,采用舒适度控制结构设计。通过选取不同的频率、阻尼比等参数对主桥结构进行人致振动分析,计算得出桥梁竖向加速度和侧向加速度值。根据计算结果进行舒适度评价,并分析不同参数对舒适度的影响。分析结论,可用于指导该类人行桥的设计。
Xinjiangwan space corridor is located in Yangpu District, Shanghai. The main bridge is a special-shaped annular steel structure with large span,complex bridge load and high beam height, which is difficult to achieve by conventional design methods.In the design, the comfort control structure is designed according to the foreign specifications.By choosing different frequency, damping ratio and other parameters to analyze the pedestrianinduced vibration of the main bridge structure,the vertical acceleration and lateral acceleration of the bridge are calculated, and the comfort degree is evaluated according to the calculation results, and the influence of different parameters on the comfort degree is analyzed. The analysis conclusion can be used to guide the design of this kind of pedestrian bridge.
Xinjiangwan space corridor is located in Yangpu District, Shanghai. The main bridge is a special-shaped annular steel structure with large span,complex bridge load and high beam height, which is difficult to achieve by conventional design methods.In the design, the comfort control structure is designed according to the foreign specifications.By choosing different frequency, damping ratio and other parameters to analyze the pedestrianinduced vibration of the main bridge structure,the vertical acceleration and lateral acceleration of the bridge are calculated, and the comfort degree is evaluated according to the calculation results, and the influence of different parameters on the comfort degree is analyzed. The analysis conclusion can be used to guide the design of this kind of pedestrian bridge.
引文
[1]李钊,陈文艳.熠熠生辉的东方之钻:新江湾城空中连廊[J].H+A华建筑,2018(6):140-145.
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[2]城市人行天桥与人行地道技术规范:CJJ 69-95[S].北京:中国建筑工业出版社,1996.
[3]梁炜.太原市汾河跻汾人行桥减震设计及研究[J].城市道桥与防洪,2012(8);198-202.
[4]李钊.某异形大跨钢结构人行桥设计研究[J].中国市政工程,2016(6):12-15.
[5]贾京.浅谈大跨度人行桥舒适度评估与减振设计[J].福建建设科技,2018(4):8-11,13.
[6]Design of footbridge guideline:EN03(2007)[S].Berlin:Research Found forCoal&Steel,2008.
[7]陈政清,华旭刚.人行桥的振动与动力设计[M].北京:人民交通出版社,2009.
[8]乐小刚.城市人行天桥舒适度设计标准探讨[J].中国市政工程,2016(6):23-24,28.