摘要
以宜万铁路大跨度铁路钢桁拱桥-万州长江大桥为工程背景,通过施工方案空间过程仿真进一步优化了杆件安装顺序,并确定了施工过程控制测试的重要杆件;无线综合测试系统的采用实现应力及线形的实时、定时巡测及定点单测数据采集,及时掌握了钢桁拱结构的线形及应力状态;温度效应的测试及理论计算,为选定合龙时机、利用温度变形进行杆件合龙的微调提供了有益的指导,实现了大跨度钢桁拱结构的零误差、零附加应力合龙。
Taking a long-span railway arch bridge on Yichang-Wanzhou railway, Wanzhou Yangtze River Bridge, as the engineering example, the spatial simulation of construction progress scheme is carried out by FEM to optimize the truss member assembling sequence and determine the critical bar members which should be monitored during construction. Stress and deflection data are real-time or fixed time/position collected by wireless integrated test system to under stand the status of stress and deflection of steel truss arch structure. The measurement and theoretical computation of temperature effect are valuable for selecting closure time and utilizing temperature deformation to adjust steel bar closure. The long-span steel truss arch bridge structure is closed under the conditions of zero error and zero additional stress. The success of construction of this bridge provided the experience and guidance to other similar bridge projects.
出处
《公路交通科技》
CAS
CSCD
北大核心
2014年第5期78-85,134,共9页
Journal of Highway and Transportation Research and Development
关键词
桥梁工程
钢桁拱桥
仿真
工序优化
施工控制技术
温度效应
bridge engineering
steel truss arch bridge
simulation
process optimization
constructioncontrol technique
temperature effect
