%0 Journal Article
%T 应用正交法的锁死销减震效果影响因素研究
%A 张文学
%A 陈士通
%A 
%A 杜修力
%A 张耀辉
%J 湖南大学学报(自然科学版)
%D 2016
%X 为充分利用活动墩的抗震潜能提高连续梁桥的整体抗震性能，提出了加速度激活的锁死销减震装置.为明确影响连续梁桥锁死销减震效果的影响因素，结合某七跨等高连续梁桥，对激活阈值、锁死间隙、桥墩高度、场地类型和连接刚度5个影响因素进行研究，其中每个影响因素安排了5个水平，运用正交试验设计原理，进行了相关数值模拟试验，分析了锁死销的减震效果，并通过极差分析找到了影响减震效果的主要因素和次要因素，给出了锁死销应用的分析步骤.进一步研究了主要因素激活阈值的取值范围和连接刚度对减震效果的影响规律，研究表明，墩顶加速度与桥墩自振周期密切相关，根据桥墩自振周期即可确定激活阈值取值范围；锁死销连接刚度的改变对减震效果具有一定影响，连接刚度越大，连续梁桥应用锁死销减震效果越好.</br>In order to fully use the seismic bearing capacity of sliding piers to improve the seismic performance of continuous bridges，the acceleration activating locking dowel was developed and installed between the piers and beams. To investigate the principal influencing factors on the damping effect of the locking 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 orthogonal 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 analysis. Furthermore, the influences of the activating threshold range and connection stiffness on dampingeffect 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 vibration period of the pier. Moreover, the damping effect of the device is significantly influenced by the connection stiffness.When the connection stiffness increases, the damping effect is improved.
%K 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&lt
%K /br&gt
%K continuous bridge orthogonal experimental design extreme difference analysis locking dowel damping devices numerical simulation
%U http://hdxbzkb.cnjournals.net/ch/reader/view_abstract.aspx?file_no=20160905&flag=1