Seismic Response Of A Single Story
Innovative Steel Frame System
Author(s)
M. Dicleli & A. Mehta
Abstract
The presented research studies the seismic response of a new braced steel frame
type and a new design philosophy that will focus on minimizing damage to the
essential structural members and ensuring satisfactory post-earthquake
performance of steel buildings under service loads with minimal rehabilitation
costs. The proposed frame type is composed of beams and columns with rigid
connections, chevron braces and a conventional energy-dissipating member
called the shear element connected between the braces and the beam. Nonlinear
static pushover and seismic analyses are conducted to assess the performance of
the proposed efficient energy dissipating steel frame (EEDBF) compared to the
conventional concentrically braced frames (CBFs) and moment resisting frames
(MRFs). The results have revealed that the EEDBF has a more stable
force-lateral deformation hysteresis loop compared to CBF. The energy
dissipation is comparable with MRF. The story drift of the EEDBF at medium to
large intensity ground motions is smaller than that of both the CBF and MRF.
Keywords: steel, frame, brace, buckling, shear, nonlinear, seismic, performance.
1 Introduction
MRFs, and CBFs are commonly used in the construction of steel buildings.
MRFs provide open vertical space to architects and have large ductility capacity
as compared to other frame types. But the ductility demand on these frames is
highly sensitive to the gravity loads acting on their members Park et al. [1].
Moreover, MRFs require larger member sizes as compared to other frames
Bruneau et al. [2]. In MRFs, as the inelastic bending deformation of the beams
results in dissipation of earthquake input energy Della Corte et al. [3],
Keywords
steel, frame, brace, buckling, shear, nonlinear, seismic, performance.
Related Book
Other papers in this volume
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