[1]黄娟,彭立敏,陈松洁..高速移动荷载作用下铁路隧道的动力响应分析[J].郑州大学学报(工学版),2008,29(03):117-121.[doi:10.3969/j.issn.1671-6833.2008.03.030]
　HUANG Juan,PENG Limin,Chen Songjie.Dynamic response analysis of railway tunnels under high-speed moving loads[J].Journal of Zhengzhou University (Engineering Science),2008,29(03):117-121.[doi:10.3969/j.issn.1671-6833.2008.03.030]
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高速移动荷载作用下铁路隧道的动力响应分析()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
29
期数:
2008年03期
页码:
117-121
栏目:
出版日期:
1900-01-01

文章信息/Info

Title:
Dynamic response analysis of railway tunnels under high-speed moving loads
作者:
黄娟; 彭立敏; 陈松洁.
中南大学,土木建筑学院,湖南,长沙,410075, 中南大学,土木建筑学院,湖南,长沙,410075, 中南大学,土木建筑学院,湖南,长沙,410075
Author(s):
HUANG Juan; PENG Limin; Chen Songjie
关键词:
铁路隧道;  动力响应;  移动荷载;  高速
Keywords:
DOI:
10.3969/j.issn.1671-6833.2008.03.030
文献标志码:
A
摘要:
从梁的强迫振动微分方程中得到移动荷载的处理方法,考虑了荷载的时间效应和空间效应,在开挖静力场的基础上对高速移动荷载下铁路隧道的动力响应进行分析.结果表明:结构最大动力响应发生在轮对经过测点后的某个时刻,略滞后于经过时刻点;结构竖向位移、加速度和动应力随着行车速度的提高而增大,其中仰拱动应力对行车速度最为敏感;高应力区主要集中在仰拱和边墙上,仰拱和边墙是隧道动力设计的薄弱部位;列车荷载作用下,结构破坏主要受抗拉强度控制.
Abstract:
The processing method of moving load is obtained from the differential equation of forced vibration of the beam, and the dynamic response of the railway tunnel under high-speed moving load is analyzed on the basis of the excavation static field, considering the temporal and spatial effects of the load. The results show that the maximum dynamic response of the structure occurs at a certain moment after the wheelset passes the measurement point, and slightly lags behind the passing point of the time. The vertical displacement, acceleration and dynamic stress of the structure increase with the increase of driving speed, among which the upward arch stress is the most sensitive to driving speed. The high stress area is mainly concentrated in the inverted arch and side wall, which are the weak points of the tunnel dynamic design. Under the load of train, the structural failure is mainly controlled by the tensile strength.

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更新日期/Last Update: 1900-01-01