“房桥合一”结构车致振动响应分析及舒适度评价

Vehicle-induced Vibration Response Analysis and Comfort Evaluation of“Building-Bridge Integration”Structure

以北京南站大跨度站厅为工程背景,根据荷载实际作用位置进行结构动力时程分析;通过数值模拟结果确定高架站厅现场试验测点布置方案,获取高架站厅关键位置的动力响应.对实测数据的分析表明,列车类型与荷载作用位置对高架站厅结构振动响应影响明显.参照振动舒适度标准,高架站厅结构的实测振动强度接近甚至超过规范限值,而现场烦恼率实际值与其理论值不符,说明现有结构舒适度评价标准并不适合直接用于'房桥合一'结构体系的高架站厅结构的舒适度评价.

This paper chooses a long-span station hall of Beijing South Station as engineering back-ground to evaluate the comfort of ＂Building-bridge Integration＂ structures. On the basis of the results of numerical simulation that applies train loads to the structure model at the actual location, dynamic re- sponse of the elevated station hall is presented and examined. The result shows that train type and load tocation significantly influence the structure behavior. Compared with existing standards for structure vibration comfort, the measured vibration intensity is close to or greater than the current specification limits. The actual annoyance rate does not agree with the theoretical value, which indicates that existing comfort evaluation criteria are not suitable to evaluate the comfort of ＂Building-Bridge integration＂ structure systern.