摘要
为明确MTC装置力学性能及设计参数影响的一般规律,针对力学性能开展拟静力试验研究,并采用有限元模型进行验证分析,在此基础上基于正交试验设计开展MTC装置初始刚度参数影响显著性分析,并探究MTC装置初始刚度在显著性参数影响下的变化规律。结果表明,考虑装配间隙调整后有限元与试验所得连接刚度较为一致,所建有限元模型可反映MTC装置连接刚度实际变化情况;MTC装置初始刚度参数影响显著性顺序为耗能挡板高度、厚度、短底边长度、长底边长度、挡板间距;耗能挡板高度、厚度及短底边长度为影响MTC装置初始刚度的显著性参数,利用MTC装置进行连续梁桥抗震设计时可适当改变三者取值对装置初始刚度进行调整,以实现理想减震效果。
Here, to clarify general rules of mechanical properties of multi-stage timely control(MTC) connection device and effects of design parameters, MTC device’s quasi-static tests were conducted to study its mechanical properties, and the finite element model was used for verification analysis. Then, the significance analysis of effects of MTC device initial stiffness parameters was performed based on orthogonal test design, and change laws of initial stiffness of MTC device under effects of significant parameters were explored. The results showed that after considering adjustment of assembly gap, the connection stiffness obtained with finite element model is more consistent to that obtained in tests, so the established finite element model can reflect actual change of MTC device connection stiffness;the influence significance order of MTC device’s initial stiffness parameters is energy dissipation baffle’s height, thickness, short bottom edge length, long bottom edge length and baffle spacing;energy dissipation baffle’s height, thickness and short bottom edge length are significant parameters affecting initial stiffness of MTC device;when MTC device was used for aseismic design of continuous beam bridges, these 3 values can be appropriately changed to adjust initial stiffness of MTC device, and realize ideal vibration reduction effect.
作者
陈士通
张茂江
许鑫祥
李然
CHEN Shitong;ZHANG Maojiang;XU Xinxiang;LI Ran(State Key Lab of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Hebei Provincial Engineering Innovation Center for Traffic Emergency and Guarantee,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2022年第23期182-189,共8页
Journal of Vibration and Shock
基金
国家自然科学基金项目(51678376)
省部共建交通工程结构力学行为与系统安全国家重点实验室自主课题(ZZ2020-13)。
关键词
MTC装置
力学性能
初始刚度
设计参数
正交试验
参数分析
multi-stage timely control(MTC)connection device
mechanical performance
initial stiffness
design parameters
orthogonal test
parametric analysis
