Ultimate Load Capacity and Reinforcement of Circular-Hollow-Section N-Joint  

作　　者：韩庆华 芦燕 于宝林 尹越 

机构地区：[1]School of Civil Engineering, Tianjin University [2]Tianjin Key Laboratory of Civil Engineering Structures and New Materials [3]Department of Civil and Environmental Engineering, The University of Tennessee

出　　处：《Transactions of Tianjin University》2010年第1期1-5,共5页天津大学学报（英文版）

基　　金：Supported by National Natural Science Foundation of China (No.50608054)

摘　　要：Experimental research and numerical analysis were applied to study the ultimate load capacity(ULC) and reinforcement of circular-hollow-section N-joint.Four specimens were tested under static load.The ULC of each specimen was obtained and the detailed failure conditions were discussed.Based on the results, both welding a plate on the chord member and filling concrete in the chord member are effective to reinforce the N-joint, but it is suggested that these two methods should not be applied simultaneously.Mo...Experimental research and numerical analysis were applied to study the ultimate load capacity(ULC) and reinforcement of circular-hollow-section N-joint.Four specimens were tested under static load.The ULC of each specimen was obtained and the detailed failure conditions were discussed.Based on the results, both welding a plate on the chord member and filling concrete in the chord member are effective to reinforce the N-joint, but it is suggested that these two methods should not be applied simultaneously.Moreover, considering the four important influence factors of ULC of the joints, the ratio of chord diameter to chord thickness, the ratio of diagonal member diameter to chord member diameter, the axial load on the chord member and the gap size between the two brace members, a new prediction formula of ULC of N-joint was put forward based on numerical analysis results.The new formula was proved to be more accurate than the current Chinese design code in a wide range.

关 键 词：circular-hollow-section N-joint ultimate load capacity REINFORCEMENT experimental research numerical analysis prediction formula 

分 类 号：TU398.9[建筑科学—结构工程]