悬浮隧道整体结构行为机理试验研究4:激振方法构想与实践  

Submerged floating tunnel overall structural behavior mechanism experimental study 4:Excitation methods conception and practice

作　　者：曾繁旭 周卓炜 林巍 邹威[1,3] ZENG Fan-xu;ZHOU Zhuo-wei;LIN Wei;ZOU Wei(CCCC SFT Structural and Design Methodology Research Technical Tackling Team,Zhuhai,Guangdong 519000,China;Dalian University of Technology,Dalian,Liaoning 116024,China;CCCC Highway Consultants Co.,Ltd.,Beijing 100088,China)

机构地区：[1]中交悬浮隧道结构与设计方法研究攻关组,广东珠海519000 [2]大连理工大学,辽宁大连116024 [3]中交公路规划设计院有限公司,北京100088

出　　处：《中国港湾建设》2020年第2期26-30,共5页China Harbour Engineering

摘　　要：悬浮隧道整体结构行为机理试验的重要工况是人为激发并观察模型结构自振运动响应。文中讨论多种悬浮隧道模型激振试验的方法,包括自由振动衰减法、共振法和脉动法;前者又可通过锤击实现初速度或通过拉线-快速脱开实现初位移。简述各类方法的原理和实现方式、注意事项,并进行优缺点比较。One of the essential scenarios in submerged floating tunnel overall structural behaviour test is to artificially impose excitation to the model structure and observe its response.In this paper,we discussed various possible methods to excite the SFT overall structural model.Those are including free decay method,resonance method and impulse method;The former can be made by hammer-knocking to have the initial velocity or by tension-line and releasing to achieve initial displacement.Further,the test principle,test method,precautions,and comparison of their advantages and disadvantages were briefed.

关 键 词：悬浮隧道 物模试验 自振特性 自由振动衰减法 共振法 脉动法 

分 类 号：U459.9[建筑科学—桥梁与隧道工程]