期刊论文

Dynamic responses of bridge-tunnel approaching parts under different seismic excitation directions in soft surrounding rock

中文

岩土力学

1000-7598

2019

40

3

893-902,912

10.16285/j.rsm.2017.1869

国家自然科学基金项目(No.51408617) 中南大学博士后科研启动基金(No.169720) 国家自然科学基金项目(No.51578550,No.51204215) 中南林业科技大学引进***人才科研启动基金项目(No.1040331)。

本校为其他机构

在遭遇强烈地震时,复杂地形和地质条件下高速铁路桥隧搭接段是容易出现严重损伤或破坏的一类复杂连接工程组合体。但是,目前国内外对于统筹考虑桥-隧-岩这一复杂系统内不同结构、部位之间相互作用的在强烈地震作用下的震害机制与动力响应的研究仍不多见。为此,设计并完成了多组基于大型振动台的不同方向地震激励下的模型试验,分析了软岩桥隧搭接段的动力响应特点及激励方向的影响机制。试验结果表明,强烈地震作用对桥-隧-软岩系统的安全与整体稳定非常不利,且隧道洞口及桥梁端部的加速度、位移、应变等地震响应数值大小及变化规律在不同方向地震激励下有显著的差异性。隧道扩大段拱顶和拱脚、标...

The high-speed railway bridge and tunnel junction is considered as a complex engineering project. At the event of strong earthquake, serious damage or even completely destruction of this junction would occur under complex topography or poor geological conditions. However, there is limited information on the seismic damage mechanism and dynamic response of interactions between different structures and locations in the complex bridge-tunnel-rock system. Therefore, large-scale shaking table tests were carried out on soft surrounding rock. The seis...