Advancing Seismic Design Of Rammed Earth Structures In Nepal Through Strengthening Techniques And Numerical SimulationPages 78-91
Abstract:
This study presents the seismic performance of rammed earth buildings in Nepal using finite element analysis. Three single-storey and two double-storey typologies of Rammed Earth (RE) buildings were modeled for unstrengthened and strengthened cases in DIANA FEA. Non-linear pushover and incremental dynamic analyses were performed to analyze their response to seismic loads. The seismic performance analysis of roof beam addition or horizontal band addition strengthening strategies show base shear capacity increase from 40 kN to 152 kN in one storied building and to 170 kN in two two-storied building when strengthened enhancing seismic performance. Collapse probability for one storied building for PGA of 0.35 g decreased from 40% without any strengthening to 35% when strengthened with beam and to 30% when strengthened with both beam & bands i.e. 10% less probabilities of reaching critical damage states in reinforced counterparts showing acceptable risk levels for MPEs in the Nepalese context.
Keywords: Finite element analysis, IDA, Rammed earth, Seismic assessment, Seismic strengthening
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