TY - JOUR
T1 - Seismic response mitigation of base-isolated buildings
AU - Stanikzai, Mohammad Hamayoun
AU - Elias, Said
AU - Rupakhety, Rajesh
N1 - Funding Information:
It was part of the employment activity no extra funds were given to this study. Authors acknowledge the eorts of reviewers and editors for improving the quality of the paper. First author acknowledges the department of Civil and Environmental Engineering, Old Dominion University, for allowing him to use the work stations and space. Second and third authors acknowledge support from the University of Iceland Research Fund.
Publisher Copyright:
© 2020 by the authors.
PY - 2020/2/1
Y1 - 2020/2/1
N2 - Earthquake response mitigation of a base-isolated (BI) building equipped with (i) a single tuned mass damper at the top of the building, (ii) multiple tuned mass dampers (MTMDs) at the top of the building, and (iii) MTMDs distributed on different floors of the building (d-MTMDs) is studied. The shear-type buildings are modeled by considering only one lateral degree of freedom (DOF) at the floor level. Numerical approach of Newmark's integration is adopted for solving the coupled, governing differential equations of motion of 5-and 10-story BI buildings with and without TMD schemes. A set of 40 earthquake ground motions, scaled 80 times to get 3200 ground motions, is used to develop simplified fragility curves in terms of the isolator maximum displacement. Incremental dynamic analysis (IDA) is used to develop simplified fragility curves for the maximum target isolator displacement. It is found that TMDs are efficient in reducing the bearing displacement, top floor acceleration, and base shear of the BI buildings. In addition, it was noticed that TMDs are efficient in reducing the probability of failure of BI building. Further, it is found that the MTMDs placed at the top floor and d-MTMDs on different floors of BI buildings are more efficient in decreasing the probability of failure of the BI building when compared with STMD.
AB - Earthquake response mitigation of a base-isolated (BI) building equipped with (i) a single tuned mass damper at the top of the building, (ii) multiple tuned mass dampers (MTMDs) at the top of the building, and (iii) MTMDs distributed on different floors of the building (d-MTMDs) is studied. The shear-type buildings are modeled by considering only one lateral degree of freedom (DOF) at the floor level. Numerical approach of Newmark's integration is adopted for solving the coupled, governing differential equations of motion of 5-and 10-story BI buildings with and without TMD schemes. A set of 40 earthquake ground motions, scaled 80 times to get 3200 ground motions, is used to develop simplified fragility curves in terms of the isolator maximum displacement. Incremental dynamic analysis (IDA) is used to develop simplified fragility curves for the maximum target isolator displacement. It is found that TMDs are efficient in reducing the bearing displacement, top floor acceleration, and base shear of the BI buildings. In addition, it was noticed that TMDs are efficient in reducing the probability of failure of BI building. Further, it is found that the MTMDs placed at the top floor and d-MTMDs on different floors of BI buildings are more efficient in decreasing the probability of failure of the BI building when compared with STMD.
KW - Base-isolated buildings
KW - Bearing displacement
KW - d-MTMDs
KW - Earthquake
KW - Incremental dynamic analysis
KW - MTMDs
KW - STMD
UR - http://www.scopus.com/inward/record.url?scp=85081243058&partnerID=8YFLogxK
U2 - 10.3390/app10041230
DO - 10.3390/app10041230
M3 - Article
AN - SCOPUS:85081243058
SN - 2076-3417
VL - 10
JO - Applied Sciences (Switzerland)
JF - Applied Sciences (Switzerland)
IS - 4
M1 - 1230
ER -
