Influence Of Steel Bars In Monolithic
Floor Slabs On The Yielding-damage Mechanism
Of Frame Structures
Author(s)
J. Yuan & D. Hu
Abstract
Aiming at the seismic design requirement of \“strong column-weak beam” frame
structure and combined with test data analysis and computer simulation, the
influence of slab bar participation on inelastic response and the yielding-damage
mechanism of frame structure have been investigated. Two design schemes that
considering the slab bars or neglecting the slab bars were respectively applied to
an example frame building to compare the damage situations, which were
simulated by the nonlinear time history analysis program SARCF (Seismic
Analysis of Reinforced Concrete Frames). The research indicated that slab bars
in the tensile zone have a direct enhancing action on the capacity of the frame
beam resisting negative moment, which will increase with the augmentation of
the monolithic deformation of the beam-slab member. The effect of slab bar
participation will develop adequately after the peak ground acceleration acting
on the structure reaches the level of design basic acceleration of ground motion.
The design method neglecting the slab bars will underestimate the actual flexural
strength of the frame beam, which will result in a change of seismic behavior of
the structure from \“strong column-weak beam” to \“strong beam-weak column”,
and the probability of the change will increase with the augmentation of
earthquake action.
Keywords: frame structure, slab bars, strong column-weak beam, yielding
mechanism, damage situation.
Keywords
frame structure, slab bars, strong column-weak beam, yielding
mechanism, damage situation.
Related Book
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