ABSTRACT

This paper presents preliminary field observations and analytical results on the tubular damaged structures at Kumamoto after the 2016 Kumamoto Earthquakes. It comprises two damaging earthquakes on 14th event at Magnitude 6.5 and JMA Seismic Intensity 7 and 16th event at Magnitude 7.3 and JMA Seismic Intensity 7, April 2016. Damaged steel structures focused on tubular truss, tubular braced frames with flexural buckling, fracture of the joints and damaged supports are on performance of roof truss of gymnasium and space structures. The gymnasium with serious damaged roof has been investigated with 3D time history response analysis. The results of the analysis of reinforced concrete frame with steel roof focused on displacement of roller supports are presented.