摘要
通过对现行模板钢管支架在现浇桥梁应用过程中频繁出现倒塌事故的研究,发现其自身结构的缺陷是主要原因之一。根据现浇桥梁支撑结构的组合类型分析,设计了一种新型钢管支架——蟹钳式自锁三角形钢管支架。通过软件模拟、力学试验确定了钢管支架的4种细部连接组成结构,并进行了试验室破坏试验。结果表明:单元由三角形构件组成,通过三角形支架首尾依次连接,形成的正方体空间结构钢管支架最为稳定,也是承载力最高的支架之一,可以在公路大荷载现浇桥梁临时支撑结构中使用。
The defect of the structure is the main failure reason through the analysis of the frequent collapse accidents of current steel pipe formwork during cast-in-situ bridge construction. A newcrab-claw-type self-locking triangle steel pipe scaffolding was designed according to analysis on the components types of the scaffolding used for cast-in-situ bridge construction. Through the simulation and experimental test,four joints in the structure were determined and tested. At the same time,laboratory failure test was carried out. The results showthat the unit is constituted of triangle components and connected by triangle scaffolding,forming cubic space. The cubic space structure units are of the highest stability and bearing capacity. It can be applied in the temporary structure of heavy-loading cast-in-situ bridges.
出处
《铁道建筑》
北大核心
2016年第7期35-38,共4页
Railway Engineering
关键词
现浇桥梁
三角形钢管支架设计
破坏试验
工程应用
Cast-in-situ bridge
Triangle steel pipe scaffolding design
Failure test
Engineering application
