重力式桥墩在泥石流冲击作用下的响应分析
发布时间：2018-09-03 17:11
【摘要】：为研究重力式桥墩在泥石流冲击作用下的安全性,以某既有铁路重力式桥墩结构作为研究对象,采用ANSYS+CFX建立了泥石流冲击桥墩的流固耦合分析模型,分析桥墩在不同参数的泥石流冲击作用下的响应情况,同时采用LS-DYNA软件分析泥石流中大块石对桥墩的冲击力,进而对桥墩的安全性进行评估。结果表明:随着速度、容重和黏度的增加,泥石流冲击力也随之增加;泥石流中大块石对桥墩的冲击力较大,分析中不可忽略;桥墩在泥石流冲击、大块石冲击以及横向风荷载作用下,桥墩的横向偏心距、抗倾覆稳定性、抗滑稳定性、基底应力均难以满足规范要求。因此,应加强对可能遭遇泥石流灾害的重力式桥墩的监测和分析,采取有效措施以确保泥石流冲击作用下结构安全可靠。
[Abstract]:In order to study the safety of gravity pier under the impact of debris flow, taking the gravity pier structure of an existing railway as the research object, the fluid-solid coupling analysis model of debris flow impact pier is established by using ANSYS CFX. The response of bridge pier under the impact of debris flow with different parameters is analyzed. At the same time, LS-DYNA software is used to analyze the impact force of large rock masses on the pier, and then the safety of the pier is evaluated. The results show that with the increase of velocity, bulk density and viscosity, the impact force of debris flow also increases; Under the action of large rock impact and transverse wind load, the lateral eccentricity, the stability against overturning, the stability against sliding and the stress of the base are all difficult to meet the requirements of the specifications. Therefore, it is necessary to strengthen the monitoring and analysis of the gravity pier which may be affected by debris flow, and take effective measures to ensure the safety and reliability of the structure under the impact of debris flow.
【作者单位】： 西南交通大学桥梁工程系;
【基金】：国家自然科学基金项目(51478400) 铁道部科技研究开发计划重大课题(Z2012-061)~~
【分类号】：U445.75;U447
本文编号：2220635
[Abstract]:In order to study the safety of gravity pier under the impact of debris flow, taking the gravity pier structure of an existing railway as the research object, the fluid-solid coupling analysis model of debris flow impact pier is established by using ANSYS CFX. The response of bridge pier under the impact of debris flow with different parameters is analyzed. At the same time, LS-DYNA software is used to analyze the impact force of large rock masses on the pier, and then the safety of the pier is evaluated. The results show that with the increase of velocity, bulk density and viscosity, the impact force of debris flow also increases; Under the action of large rock impact and transverse wind load, the lateral eccentricity, the stability against overturning, the stability against sliding and the stress of the base are all difficult to meet the requirements of the specifications. Therefore, it is necessary to strengthen the monitoring and analysis of the gravity pier which may be affected by debris flow, and take effective measures to ensure the safety and reliability of the structure under the impact of debris flow.
【作者单位】： 西南交通大学桥梁工程系;
【基金】：国家自然科学基金项目(51478400) 铁道部科技研究开发计划重大课题(Z2012-061)~~
【分类号】：U445.75;U447
【相似文献】
相关期刊论文 前2条
1 王林峰;唐红梅;陈洪凯;;泥石流冲击作用下路基的毁损机制研究[J];公路;2011年11期
2 王积忠;公路跨越泥石流的桥涵孔径设计[J];青海交通科技;2000年01期
相关重要报纸文章 前1条
1 本报记者 胡彦殊;都汶公司奋力保卫“生命通道”[N];四川日报;2010年
，本文编号：2220635
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2220635.html
