摘要
在高频地铁列车活塞风压和环境腐蚀共同作用下,地铁区间联络通道防火门肩负着抗疲劳、防火、抗腐蚀三重功能,由于缺乏相应的设计和验收标准,现有地铁区间联络通道防火门出现各种破损导致门体功能失效的情况时有发生。文章通过对地铁活塞风压分析,确定设计风荷载标准值和防火门整体及易损件正常工作的疲劳寿命,并基于此设计目标提出匹配性设计概念,对防火门整体和细部构造进行设计。且通过有限元计算,发现防火锁与铰链是影响防火门疲劳寿命的关键部件。同时在模拟的±4.0 kPa往复风压作用下,采用3点锁闭点防火锁及其闭锁点和铰链的预测循环寿命均达到设计预期。抗疲劳风压试验显示,采用4点锁闭点的防火锁能够满足设计目标并能保证1.5倍的抗疲劳安全储备。
Under the joint action of high-frequency metro train piston wind pressure and environmental corrosion,the fire door of metro section liaison channel shoulders the triple functions of anti-fatigue,fire prevention and corrosion resistance.Due to the lack of corresponding design and acceptance standards,the fire door of the existing metro section liaison channel suffers from various kinds of damages,resulting in the functional failure of the door body.By analyzing the pressure of the metro piston wind,the standard value of design wind load and the fatigue life of the fire door as a whole and the normal operation of the wear parts are determined,and based on such design objective,the matching design concept to design the fire door as a whole and the detailed structure are proposed.Through the finite element calculation,it is discovered that the fireproof lock and hinge are the key components affecting the fatigue life of the fire door.Under the simulated±4.0 kPa reciprocating wind pressure,the predicted cycle life of the fireproof lock with 3-point locking points,its locking points and hinges could all meet the design expectation;at the same time,the antifatigue wind pressure test shows that the fireproof lock with 4-point locking points meets the design goal and warrants 1.5 times of the anti-fatigue safety reserve.
作者
姬伟
JI Wei(Beijing Rail Transit Construction Management Co.,Ltd.,Beijing 100037,China)
出处
《现代城市轨道交通》
2024年第7期124-129,共6页
Modern Urban Transit
