Free Vibration Analysis of Frame-Core Tube Structures Attached with Damped Outriggers
The classical outrigger in frame-core tube structure cantilevering from the core tube or shear wall connected to the perimeter columns directly,which can effectively improve the lateral stiffness of the structure.A new energy-dissipation system for such structural system is studied,where the outrigger and perimeter columns are separate and vertical viscous dampers are equipped between the outrigger and perimeter columns to make full use of the relative big displacement of two components.The effectiveness of proposed system is evaluated by means of the modal damping ratio based on the proposed simplified model.The mathematic models of the structural system are obtained with both the assumed mode shape method and finite element method according to the simplified calculation diagram.Based on the modal damping ratio,the optimal damping coefficients of linear viscous dampers are determined,and effectiveness of proposed system is confirmed.
frame-core tube structures outrigger viscous damper free vibration analysis
Zhihao Wang
North China University of Water Resources and Electric Power, Zhengzhou 450011, China
国际会议
郑州
英文
648-651
2012-09-22（万方平台首次上网日期，不代表论文的发表时间）