湖南大学学报（自然科学版）2016，Vol.43Issue(9)：36-42,7.
应用正交法的锁死销减震效果影响因素研究
Influencing Factors on Damping Effect of Locking Dowel Using Orthogonal Experiment Design
摘要
Abstract
In order to fully use the seismic bearing capacity of sliding piers to improve the seismic per-formance of continuous bridges,the acceleration activating locking dowel was developed and installed be-tween the piers and beams.To investigate the principal influencing factors on the damping effect of the loc-king dowel and optimize the damping performance of the locking dowel,taking a seven-span continuous bridge as an example,five test parameters including acceleration activating thresholds,locking clearance, pier height,site condition,and connection stiffness were studied.On the basis of the principle of the or-thogonal experiment design,five levels for each factor and twenty-five text schemes were considered.The primary and secondary influencing factors on damping effect were obtained by the extreme difference analy-sis.Furthermore,the influences of the activating threshold range and connection stiffness on damping effect were analyzed.The investigation results indicate that the acceleration of the pier top and the natural vibration period of the pier are closely related,and the acceleration activating thresholds can be determined from the natural vi-bration period of the pier.Moreover,the damping effect of the device is significantly influenced by the connection stiff-ness.When the connection stiffness increases,the damping effect is improved.关键词
连续梁桥/正交试验设计/极差分析/锁死销/减震装置/数值模拟Key words
continuous bridge/orthogonal experimental design/extreme difference analysis/locking dowel/damping devices/numerical simulation分类
交通工程引用本文复制引用
张文学,陈士通,杜修力,张耀辉..应用正交法的锁死销减震效果影响因素研究[J].湖南大学学报（自然科学版）,2016,43(9):36-42,7.基金项目
国家自然科学基金资助项目（51378034），National Natural Science Foundation of China（51378034）；北京市自然科学基金资助项目 （）
