Seismic Performance Assessment of Long Span Spc Composite Beam

Abstract eng:
Many research works on the steel plate-concrete structures have been conducted recently. The steel plate concrete structures as composite structures can be effectively used to replace conventionally reinforced concrete structures through reducing construction duration. In this research, a technical assessment of seismic performance for low rise building was suggested based on the ASCE-41 design guidelines. After the push-over analysis, the roof displacement was transformed to both Spectral Acceleration and Spectral Displacement for the targeted steel moment resisting frame. The mode shape and participation factors were calculated using the capacity spectrum method. The equivalent damping ratio and effective damping ratio were used to get the modified damping coefficient. A series of experimental test were conducted to evaluate the performance of the target object, modeling parameter, and acceptance criteria. The backbone curve from the experimental tests was used to input the parameters relating performance objection point. Additionally, three earthquakes such as El Centro, Northridge, and San Fernando were used to get the seismic responses, for the inelastic dynamic analyses. The following results were acquired from the analytical and experimental results above. First, the story drift of the composite beams in the inelastic dynamic analysis was greater than other RC and Steel structures. Second, the performance levels for RC, Steel, and tested Composite beam were IO(immediate occupancy), LS(life safety), and also LS(life safety) levels, respectively. Third, the performance points could be properly estimated and evaluated if we appropriately adopt modeling parameters from the experimental tests.

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