Minimal-Disturbance Arm Damper (MDAD) has been proposed within the seismic retrofitting scheme of minimaldisturbance to building users. The MDAD is a light-weight and han [...]

The Naturally Buckling Brace (NBB) is a steel brace developed by the writers, which consists of a high-strength and lowyielding steel channel arranged in parallel with an [...]

The present paper proposes an improved design of conventional buckling braces (CBBs) by introducing intentional eccentricity along the brace length. The proposed brace is [...]

The hollow structural section (HSS) columns are commonly used to sustain the seismic loading from any direction in Japanese steel frames due to its uniform geometry along [...]

Many existing structures in seismic vulnerable areas require seismic upgrading to prevent the collapse in case of extreme earthquakes. This paper proposes an approach bas [...]

Probabilistic seismic risk assessment of civil infrastructures has been attracting attention in Japan, especially after recent mega-earthquakes with a long-lasting series [...]

A method for reducing Secondary DOF (Degree of Freedom) from a dynamic equilibrium system into was intended to reduce considerably the storage capacity and computation ti [...]

In architecture of building history, the arch type of structures, especially made from timber elements, are aesthetically very attracting creation. Since the primitive er [...]

The work in this paper proposes a new method for reducing MDOF (Multi Degree of Freedom) system of frame structures into SDOF (Single Degree of Freedom) system and recove [...]

A seismic rehabilitation method which involves minor on-site construction work without requiring the use of heavy equipment and disruptive noise is developed. The system [...]