TY - JOUR
T1 - Brace performance with steel curved dampers and amplified deformation mechanisms
AU - Hsu, H. L.
AU - Halim, H.
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/11/15
Y1 - 2018/11/15
N2 - This study focused on the performance evaluation of new brace designs that adopted steel curved dampers with amplified-deformation mechanisms. A series of cyclic load tests on steel curved dampers and amplified-deformation braces with various damper dimensions, subjected to cyclic increasing displacement histories, were conducted. Expressions for amplified-deformation brace strength estimation were derived and proposed for engineering design references. Test results showed that significant viscous damping, approximately 25.8–36.65%, was achieved in the proposed brace, thus providing an effective mechanism to upgrade the dynamic characteristics of the structures. It was also found from the test results that the proposed braces sustained large deformation equivalent to 5% story drift without damper local buckling, exhibited stable hysteretic behavior throughout the complete load process and dissipated significant energy using amplified damper deformation, when steel curved dampers with plate depth/thickness ratios smaller than four were adopted. Simultaneous accomplishments in high strength, large deformation capability and significant energy dissipation validated the applicability of the proposed brace design to earthquake-resistant structural designs.
AB - This study focused on the performance evaluation of new brace designs that adopted steel curved dampers with amplified-deformation mechanisms. A series of cyclic load tests on steel curved dampers and amplified-deformation braces with various damper dimensions, subjected to cyclic increasing displacement histories, were conducted. Expressions for amplified-deformation brace strength estimation were derived and proposed for engineering design references. Test results showed that significant viscous damping, approximately 25.8–36.65%, was achieved in the proposed brace, thus providing an effective mechanism to upgrade the dynamic characteristics of the structures. It was also found from the test results that the proposed braces sustained large deformation equivalent to 5% story drift without damper local buckling, exhibited stable hysteretic behavior throughout the complete load process and dissipated significant energy using amplified damper deformation, when steel curved dampers with plate depth/thickness ratios smaller than four were adopted. Simultaneous accomplishments in high strength, large deformation capability and significant energy dissipation validated the applicability of the proposed brace design to earthquake-resistant structural designs.
KW - Amplified deformation
KW - Brace design
KW - Energy dissipation
KW - Seismic performance
KW - Steel curved dampers
UR - http://www.scopus.com/inward/record.url?scp=85054053083&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2018.08.052
DO - 10.1016/j.engstruct.2018.08.052
M3 - 期刊論文
AN - SCOPUS:85054053083
SN - 0141-0296
VL - 175
SP - 628
EP - 644
JO - Engineering Structures
JF - Engineering Structures
ER -