戈壁大风区高速铁路防风明洞风荷载特性及结构设计

项目名称： 戈壁大风区高速铁路防风明洞风荷载特性及结构设计

项目编号： No.51208434

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 建筑环境与结构工程学科

项目作者： 刘大刚

作者单位： 西南交通大学

项目金额： 28万元

中文摘要： 戈壁大风区在我国西北地区尤其是新疆地区分布范围较广，受区内干旱、大风等恶劣气候环境综合作用影响，高速铁路建设及运营安全成为难题。鉴于既有的防风措施无法保证列车高速运行安全需要，经安全、环境等因素综合分析，提出装配式防风明洞技术方案。 本项目以装配式防风明洞这种全新型技术方案为研究对象，重点对其承受的风荷载作用特性及结构设计问题开展研究。拟采用理论分析、数值模拟、现场实测研究手段，通过对风区内风流场分布特征、防风明洞风荷载体型系数研究，建立防风明洞风荷载计算模型，进而确定其结构风荷载分布特征及数值大小。在此基础上，综合其它荷载作用影响，通过对不对称大风荷载作用下防风明洞结构内力分布特征分析，给出其合理的结构构件划分方法；通过对防风明洞结构接头受力特征分析，给出其合理的结构构件接头型式。 项目成果对防风明洞技术方案实现、我国防风技术水平提高、戈壁大风区高速铁路建设发展均具有积极促进作用。

中文关键词： 戈壁大风区；高速铁路；防风明洞；风荷载；装配式结构

英文摘要： The gobi strong wind area distribute widely In the northwest region of China especially in Xinjiang. Because of The harsh climate environment comprehensive effect in the area, high speed railway construction and operation safety becomes a problem. In view of the existing windproof measures cannot guarantee for high-speed train operation safety needs, so the technical scheme of fabricated windproof cut-and-cover tunnel is puted forward based on the comprehensive analysis. This project as the research object to the technical scheme of windproof cut-and-cover tunnel and focuses on the research of wind load characteristics and fabricated structure design.With the research method of theoretical analysis, numerical simulation and field survey, it will build the wind load calculation model and determine wind load distribution based on the research of airflow field distribution characteristics in wind area and wind load shape coefficient of windproof cut-and-cover tunnel. On the basis of the above research, consider other load effect, it will further give the reasonable structure division method and structure type of joint based on the research of structural internal force distribution analysis and structure analysis on stress characteristics of different types of joints. The project results has the positive promoter ac

英文关键词： gobi strong wind area；high-speed railway；windproof cut-and-cover tunnel；wind load；fabricated structure