| Popis: |
Buckling-Restrained Brace (BRB) in China, Taiwan, and Japan, as a kind of hysteretic damper has been installed into steel frame structure; In the United States, however, it has been installed into the hinge-connected steel framework, as the main seismic element in order to add lateral stiffness and strength.This paper according to the design codes of frame structure in China, Japan and the United States,establishes the research model based 0n the typical steel frame form of China, Japan, and the US.The main research parameters of the model are horizontal force sharing ratio of BRB (β) and frame strength of BRB (CB)。Through the steel consumption,the relationship of story drift and story shear, the formation of plastic hinge of the design model,it compares the steel frame seismic design method of China, Japan and the United States.The steel consumption of frame is related to the strength of the frame, but has nothing to do with the frame structure form;The plastic hinge of each model focused mainly on the BRB,reflecting the overall mechanism; As to seismic design requirements, the Japanese codes are stricter, codes of China and the United States is relatively close. |
