摘要
在现浇箱梁桥施工过程中,移动模架技术已被广泛应用,取得了良好的经济效益,但对于超长、多跨移动模架的设计和应用,国内相应的工程实践相对较少。针对可用于大跨箱梁桥施工的移动模架技术,设计研发了钢筋骨架整体吊装设备,对吊运过程中承重结构的应变变化进行监测。结果表明:在静力提升和载重行驶过程中,最大应变均出现在支撑立柱顶部,分别为124.1με和326.5με,在进行结构分析与设计时,必须考虑载重行驶过程中的动力效应对结构内力的影响。监测过程中,承重立柱和钢托座处于弹性状态,整体结构具有较大的安全裕度。
In the construction of cast-in-place box girder bridge,the moving support system technology has been widely used and achieved good economic benefits.However,for the design and application of ultra-long and multi-span moving support system,there are few engineering practices in China.In this paper,aiming at the moving support system technology which can be used in the construction of long-span box girder bridge,the integral lifting equipment of reinforcement skeleton was designed and developed in this paper,and the strain changes of loadbearing structure were monitored.The results show that the maximum strain occurs at the top of support column during static lifting and load driving,which are 124.1μ ε and 326.5μ ε,respectively.In the process of structural analysis and design,the influence of dynamic effect on the internal force of the structure should be considered.During the monitoring,the load-bearing column and leg are in the elastic state,and the structure has a large safety margin.
作者
傅宗华
郑述龙
王培森
宋辰宁
Fu Zong-hua;Zheng Shu-long;Wang Pei-sen;Song Chen-ning
出处
《建筑技术开发》
2023年第11期122-124,共3页
Building Technology Development
基金
山东省自然科学基金项目(ZR2021ME238)。
关键词
大跨箱梁
移动模架
整体吊装设备
应变监测
long-span box girder
moving support system
integral lifting equipment
strain monitoring
