Study on Seismic Reinforcement for Traditional Wooden Structures

Abstract

The objective of this study is to suggest a new type of reinforcing elements, Amida-shaped frame, for traditional wooden structures. First, to make clear the mechanical characteristics of Amida-shaped frames, we conduct the static loading tests of them. Next, we analyze the difference of the restoring force characteristics and the damages between frames in parameters, size and the number of horizontal members. Finally, we simulate the static loading tests with analysis models to confirm the mechanical characteristics which can't be identified at the experiments.

Seismic Response and Nonlinear Mechanical Characteristics of Bridge Pile Foundation in Yushu Permafrost Area

“…In order to protect the fragile ecosystem and reduce the impact of the adverse geological environment on the subgrade, the bridge is often used to lead the road in the first stage of the project. However, after a strong earthquake, the change in the freeze-thaw layer will affect the dynamic characteristics of the site soil layer, which will cause seismic damage to the continuity of the pile foundation in cold regions [10][11][12][13][14][15]. (3) Soil softening causes pile sinking, which leads to bridge deck and beam damage [11,[16][17][18][19].…”

“…However, after a strong earthquake, the change in the freeze-thaw layer will affect the dynamic characteristics of the site soil layer, which will cause seismic damage to the continuity of the pile foundation in cold regions [10][11][12][13][14][15]. (3) Soil softening causes pile sinking, which leads to bridge deck and beam damage [11,[16][17][18][19]. Under the strong earthquake, due to the influence of the inertial force of the bridge superstructure, the pile foundation will move relative to the soil, and even the separation and softening of the soil around the pile will appear on the interface between the two.…”