摘要
针对高大满堂支撑架在混凝土浇筑期受到水平动荷载作用而产生的结构振动甚至失稳现象进行研究.通过原型试验,研究了在不同混凝土浇筑阶段,顶部受到水平冲击荷载作用下的满堂支撑架的动力性能.考虑在上部结构施工过程中,可能导致的扣件松脱、滑移、断裂甚至失效的情况,研究了不同工况下满堂支撑架的受力性能变化规律.借助有限元仿真分析研究了冲击荷载作用下满堂支撑架的动力反应现象.结果表明,混凝土浇筑过程中,混凝土浇筑量的增加以及剪刀撑的失效将会使得满堂支撑架的自振频率降低,容易引发架体倒塌.当部分立杆节点发生失效时,冲击荷载作用对立杆轴力影响显著增加.
The performance of vibration and instability induced by the horizontal dynamic load in high full hall formwork support during concrete placement were deeply studied.The dynamic behavior of full hall formwork support subjected to horizontal impact load with different concrete pouring amounts was investigated through prototype test.Considering the condition of fastener loosening,sliding,fracture,and even failure in the construction period,the change law of mechanical behavior of full hall formwork support under different working conditions was also found out.Dynamic response of full hall formwork support to impact load was researched through finite element simulation analysis.Based on both the experimental and the analytical results,it can be concluded that the increase of concrete pouring amounts and failure of X-bracing would decrease the frequency of free vibration,which might increase the risk of formwork support collapse.When part of main nodes invalidated,the effect of impact load on post axial force significantly increased.
作者
陆征然
郭超
李帼昌
曹硕
李重阳
Lu Zhengran;Guo Chao;Li Guochang;Cao Shuo;Li Chongyang(School of Management,Shenyang Jianzhu University,Shenyang 110168,China;School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China)
出处
《天津大学学报（自然科学与工程技术版）》
EI
CSCD
北大核心
2017年第B07期68-77,共10页
Journal of Tianjin University：Science and Technology
基金
国家自然科学基金资助项目(51308255
51678375)
中国博士后科学基金资助项目(2016M601337)
辽宁省高等学校杰出青年学者成长计划资助项目(LJQ2014059)
沈阳建筑大学博士后基金资助项目(SJZUBSH201606)
关键词
满堂支撑架
冲击荷载
动力性能
原型试验
扣件失效
full hall formwork support
impact load
dynamic performance
prototype test
fastener failure
作者简介
陆征然（1982— ），女，博士，副教授，高级工程师，luzhengranglovel@126.com.;通讯作者：郭超，guochaoglovel@126.com.
