| 摘要 |
PROBLEM TO BE SOLVED: To prevent a beam from dropping from a bridge pier due to an earthquake by arranging buffer bodies made of a plate-like elastic body having a nearly triangular cross sectional shape at the beam hook section of the bridge pier fitted with the beam via a support body. SOLUTION: A beam 2 is supported on a support body 3, and the beam 2 is mounted and fixed to a beam hook section 1. Buffer bodies 6 made of a plate-like elastic body having a nearly triangular cross sectional shape and laminated and buried with a fiber body inside are arranged in a line or multiple lines with their tilt faces faced to the support body 3 in the axial direction of the beam hook section 1 and in the direction perpendicular to it around the support body 3. When an earthquake occurs and the support body 3 is shear-fractured, the beam 2 drops on a buffer body 6. When the beam 2 is further moved by aftershock, the beam 2 is moved upward on the tilt face of the buffer body 6 while breaking the fiber body in the buffer body 6. When movement of the beam 2 further proceeds, the beam 2 drops on the next buffer body, thereby earthquake energy is damped. The beam 2 can be prevented from dropping from a bridge pier. |
