轨道列车对超大扁平式共建体结构振动影响的评估研究

Study on the Effect of Rail Train on Structural Vibration of Super Flat Joint Co-construction

轨道列车频繁穿越共建体会引起上部结构换乘旅客的不舒适感,同时也会造成楼板、填充墙、门窗洞口的振动,带来结构安全性问题。以武汉天河机场交通中心工程为例,实测由轨道列车运行引起的各楼层的动力响应,基于ISO10137∶2007、GB6722—2014《爆破安全规程》及GB/T50452—2008《古建筑防工业振动技术规范》中的相关规定,采用频率计权均方根加速度(R.M.S)、振动频率和振动速度等指标对结构舒适度和安全性进行评价,分析不同楼层、不同位置对轨道列车运行的动力响应。结果表明,在测试条件下,距列车越近的测点振动响应越大,城铁引起的振动响应比地铁小,各楼层的结构舒适度和安全性满足规范要求。

The frequent crossing construction of track trains will result in the discomfort of transferring passengers in the superstructure,and cause the vibration of the floor,infilled walls,doors and windows,which brings about structural safety problems. This paper takes the construction of Tianhe Airport Transportation Center for example,the dynamic responses of each floor caused by the operation of the track train are measured,the comfort and safety of the structure are evaluated by using R. M. S,vibration frequency and vibration velocity based on the relevant provisions of ISO10137 ∶ 2007,＂Blasting Safety Regulations＂（ GB6722—2003） and＂The Ancient Building Anti Industrial Vibration Technology Standard＂（ GB/T50452—2008）. The dynamic response of different floors and location caused by rail train is analyzed. Under the test conditions,the results show that the vibration response of the measuring points above the subway area is the largest,and the vibration response caused by urban rail lines is smaller than that of the subway. The comfort and safety of each floor meet the requirements of the standard.