风荷载与挡风结构开裂关系及试验研究  

Relationship and experimental study of wind load and wind structure cracking

作　　者：田林杰[1] 王起才[1,2] 王元[1] 杜迎东 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]道桥工程灾害防治技术国家地方联合工程实验室,甘肃兰州730070

出　　处：《铁道科学与工程学报》2016年第9期1696-1701,共6页Journal of Railway Science and Engineering

基　　金：长江学者和创新团队发展计划滚动支持资助项目(IRT15R29)

摘　　要：新建兰新二线高速铁路穿越大风区,合理设计挡风结构至关重要。沿线设立的L型挡风结构由挡风板和立柱两部分组成,二者均为钢筋混凝土构件。基于现有的钢筋混凝土开裂弯矩计算方法和理论,推导挡风板和立柱的开裂弯矩计算公式,根据挡风结构受力特点,求得挡风结构开裂时的极限风荷载值,依据极限风荷载值确定挡风结构静载试验加载方案。计算结果表明:挡风结构安全性良好,试验值和计算值对比结果表明,本文推导公式有较好的精确度。A new second-line high-speed railway cross Lanzhou to Xinjiang through the wind area, the reasona-ble design of wind-resistant structure is very important. Set up along the L-type wind structure consists of two parts, wind deflector and pillar, both for the reinforced concrete member. Based on the existing reinforced concrete cracking moment calculation method and theory, the formula of cracking moment of Wind deflector and column is derived, according to the wind structure characteristic, the limit wind load value is obtained when the wind structure is cracked, based on extreme wind load values to determine the structure of static load test wind load program. The results show that the structural safety of the wind good, experimental and calculated values comparison results showed this article derived formula has good accuracy.

关 键 词：挡风结构 开裂弯矩 极限风荷载 

分 类 号：TU375[建筑科学—结构工程]