Research on aseismic design of outer-jacketing mega frame for storey-adding

Abstract:

For the reason that the research on outer-jacketing mega frame for storey-adding’ collapse and design method that considering construction lags behind that of practice,outer-jacketing mega frames for storey-adding in Site-class I-III,design seismic group 1st-3rd,seismic fortification intensity 7-8 were analyzed and the collapse mechanism was studied by elasto-plastic analyze program IDARC2D.It reveals that the design of bottom frame is the key point to make the structure damaged with beam-hinge mechanism.Measures to avoid collapse of structure by enhance the grade suitably were put forwarded.Construction technical measures were refined according to construction practice,design method was presented based on the elasto-plastic analysis results,that provide preference for the design of outer-jacketing mega frame for storey-adding.