Abstract
A large scale shaking table model test was carried out so as to investigate into the resistant mechanism of aseismic countermeasure for existing railway masonry walls using failure prevention net and soil nailing. Model of reinforced masonry wall with its height of about 2.7m was subjected to the horizontal shaking using the design Level 2 seismic load in Railway seismic design standards in Japan. It was found from the model test that the proposed method showed sufficient seismic performance against Level 2 Earthquake. Combined resistant mechanism exhibited by the net and the soil reinforcement was also clarified by the comprehensive investigation on the dynamic response of the model masonry wall, backfill, net and soil reinforcement. Relevant pseudo static analysis revealed that the evaluated yield seismic coefficient (Kh=0.433) corresponded well with the acceleration level when the wall displacement started to accumulate in the shaking table model test (Kh≈0.5).
