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Stochastic damage‐reduction spectrum for seismic design of buildings with structural fuses
Author(s) -
Li Gang,
Wang Mengchen,
Zeng Yan,
Jiang Yi,
Hu Hao
Publication year - 2017
Publication title -
the structural design of tall and special buildings
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 43
eISSN - 1541-7808
pISSN - 1541-7794
DOI - 10.1002/tal.1346
Subject(s) - reduction (mathematics) , structural engineering , randomness , earthquake shaking table , seismic analysis , seismic loading , frame (networking) , damper , computer science , engineering , mathematics , statistics , geometry , telecommunications
Summary Stochastic damage‐reduction spectrum is proposed to design the buildings with metallic hysteretic dampers as structural fuses by considering the randomness of seismic loads. Firstly, the structure is separated into two parts: the main part with structural function and the part of structural fuses that is used to dissipate seismic energy. Then a dimensionless single‐degree‐of‐freedom (SDOF) system with trilinear restoring force is obtained via structural pushover analysis. The stochastic damage‐reduction spectrum is derived from the SDOF system by utilizing stochastic synthetic ground motions based on a set of far‐field earthquake records. Parameter set of the stochastic damage‐reduction spectrum is studied with the information of structural reliability of the SDOF system. Efficiency of the stochastic damage‐reduction spectrum is confirmed in an example of seismic design of nine‐story planar steel frame with the buckling restrained braces as the structural fuses. An extreme case of seismic load is also considered to test designs from different damage‐reduction spectrum. The seismic design is thus with higher rate of energy absorption by using the stochastic damage‐reduction spectrum.