宁波铁路南站主站房北水滴钢结构临时支撑卸载监测  

Unloading Monitoring for the Water Drop Shape Steel Structure Temporary Supports in the North Elevation of Ningbo South Railway Station

作　　者：唐忠平[1,2] 黄方林[2] 胡春晓 赵军 彭仪普[2] 

机构地区：[1]浙江工商职业技术学院建工学院,浙江宁波315012 [2]中南大学土木工程学院,湖南长沙410007 [3]中铁建设集团有限公司,北京100131 [4]浙江欣捷建设有限公司,浙江宁波315000

出　　处：《施工技术》2015年第12期119-125,共7页Construction Technology

基　　金：国家自然科学基金(51322808;51178471);住房和城乡建设部科学技术计划项目(2013-K8-31);中铁建科技项目(2010040QT2013017)

摘　　要：宁波铁路南站主站房北立面为一个大型"水滴"钢结构造型,悬挑跨度16.3m、横向跨度66.0m、质量达154t、受力复杂、卸载难度大。为确保卸载安全,采用有限元软件分别对4种卸载方案进行卸载全过程仿真分析,得出"从中间往两侧对称卸载"的最佳方案,并确定38个应力监测点和18个变形监测点及其监测预警值。利用MATLAB程序实时计算各测点的实测值,判断其变化趋势,指导现场卸载操作。监测结果表明:应力和变形实测时程曲线基本被仿真曲线包络,实测值和仿真值变化趋势基本一致,北水滴钢结构卸载过程安全可靠;该卸载监测方法科学、实施有效。The water-drop shape steel structure was located in the north elevation of Ningbo South Railway Station, whose cantilever span is 16.3 meters, transverse width is 66.0 meters, the weight is 154 tons, stress is complex, which was difficult to unload. To ensure unloading safety, the symmetrical unloading from the middle to both sides was selected as the best unloading scheme from 4 unloading schemes by the whole unloading process simulation, the 38 stress monitoring points and the 18 deformation monitoring points and the early warning value in different stages are confirmed. The measured value of each point timely is calculated by MATLAB program, the variation trend is judged, and the unloading operation on site is guided. The monitoring results demonstrate that, the measured time history curves of stress and deformation are enveloped by simulation curves basically, the change tendency of measured value and simulation value are consistent basically, the unloading monitoring scheme is scientific, and implementation is effective.

关 键 词：钢结构 铁路工程 卸载 监测 

分 类 号：TU758.11[建筑科学—建筑技术科学]