摘要
承重结构支撑整个高架桥,因此必须保证稳定性和安全性。在此背景下,进行高架桥承重结构施工振动测试分析,该分析主要分为6步骤,包括振动测试对象概况、振动测试仪器选择、振动测点布置、振动测试操作、有限元分析、测试结果分析等。结果表明:低频振动时,桥梁承重结构未发生损伤,功能完好,安全性高,且稳定性也较强;中频振动时,桥梁承重结构开始发生细微损伤,但功能仍旧完好,安全性较高,且位移变化较小,稳定性较好;高频振动时,桥梁承重结构出现较大损伤,功能受损,存在安全隐患,且位移变化非常明显,稳定性较差,需要维修。
Bearing structure supports the whole viaduct,so stability and safety must be guaranteed.Under this background,the vibration test and analysis of the elevated bridge load-bearing structure construction is carried out.The analysis is mainly divided into six steps,including the general situation of the vibration test object,the selection of vibration test instruments,the arrangement of vibration test points,vibration test operation,finite element analysis and the analysis of test results.The results show that:under low frequency vibration,the bridge bearing structure has no damage,good function,high safety and strong stability;under medium frequency vibration,the bridge bearing structure begins to suffer minor damage,but the function is still intact,the safety is high,and the displacement change is small,and the stability is good;under medium frequency vibration,the bridge bearing structure starts to suffer minor damage.When high frequency vibration occurs,the bearing structure of bridges suffers from serious damage,functional damage and potential safety hazards,and the displacement changes are obvious and the stability is poor,so it needs to be maintained.
作者
卢来运
李杨
倪鹏飞
林海兴
Lu Laiyun;Li Yang;Ni Pengfei;Lin Haixing(China Construction Seventh ENGRG Bureau Installation ENGRG Co.,Ltd,Zhengzhou 450053,China;China University of Petroleum,Qingdao 266580,China)
出处
《科技通报》
2021年第1期69-73,共5页
Bulletin of Science and Technology
关键词
高架桥
承重结构
振动测试
viaduct
load-bearing structure
vibration test
