A novel energy-dissipation system for frame-core tube structure equipped with damped outriggers is studied experimentally. A steel frame-core tube structure model is designed and manufactured, in which viscous dampers are inserted vertically between the outrigger and fame columns to make full use of motion discrepancy of these two components. Shaking table tests of the building with damped or fixed outriggers is carried out and compared for a set of earthquake records with various PGAs. 3D finite element models, representing the test models of the structure have been developed in SAP2000. A modified analytical model of dampers is proposed and used in numerical simulation, exhibiting improved agreement with experimental results. The results of shaking table test of the novel energy-dissipation system show the damped outrigger system can achieve a better performance than the fixed outrigger structure in reducing the seismic responses of the structure. Thus, the damped outrigger system provides an economical and effective strategy for improving the performance of the frame-core tube structure under earthquake excitation.
[1]
T. T. Soong,et al.
Supplemental energy dissipation: state-of-the-art and state-of-the- practice
,
2002
.
[2]
Michael Willford,et al.
The damped outrigger concept for tall buildings
,
2007
.
[3]
B. Stafford Smith,et al.
Parameter Study of Outrigger-Braced Tall Building Structures
,
1981
.
[4]
B. Sp,et al.
State of the Art of Structural Control
,
2003
.
[5]
Gary C. Hart,et al.
The structural design of tall and special buildings
,
2005
.
[6]
Zheng-qing Chen,et al.
A NOVEL PASSIVE ENERGY DISSIPATION SYSTEM FOR FRAME-CORE TUBE STRUCTURE
,
2009
.