|Table of Contents|

Study on seismic performance of steel frame-segmented rocking truss-MTMD seismic mitigation system(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年03期
Page:
58-67
Research Field:
建筑结构
Publishing date:

Info

Title:
Study on seismic performance of steel frame-segmented rocking truss-MTMD seismic mitigation system
Author(s):
MENG Qingtao;  DONG Zhiqian;  HUANG Lihua;  ZHANG Han;  LI Gang
(State Key Laboratory of Costal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China)
Keywords:
segmented rocking truss;  high-order vibration mode;  multiple tuned mass damper;  seismic performance
PACS:
TU352.1
DOI:
10.19815/j.jace.2023.03099
Abstract:
Aiming at the limited applicability of traditional rocking wall structure system in high-rise building structure, a steel frame-segmented rocking truss-multiple tuned mass damper(MTMD)damping system was proposed. The system divided the traditional rocking structure into a multi segment rocking system vertically, and arranged MTMD according to the vibration mode characteristics of the system. The single-segment, double-segment and three-segment steel frame-rocking truss seismic reduction systems were taken as the research objects. Through the nonlinear time history analysis, the influences of the number of segments, the position of segments, the lateral stiffness ratio of frame-rocking truss, the mass and layout position of MTMD on the seismic performance of the structure were studied. Finally, a 35-story steel frame-segment rocking truss structure was analyzed. The results show that the segmented rocking truss system can effectively reduce the maximum bending moment in the middle of the rocking truss. After the structure is arranged with MTMD, the maximum inter-story displacement angle is reduced by 7%-29%. The system not only has the characteristics of the traditional rocking structure system, avoids the emergence of weak layers, but also can realize the damage control of multi-order vibration modes, and effectively reduces the seismic response of the structure through MTMD energy consumption.

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Last Update: 2025-06-01