- 摘 要
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（1 中船第九設計研究院工程有限公司， 上海 200063；
2 同濟大學結構工程與防災研究所， 上海 200092）
［摘要］為了測試轉換鋼桁架節(jié)點的耗能性能，對上海長寧來福士轉換鋼桁架2個典型節(jié)點進行了滯回性能試驗研究。通過分析節(jié)點的承載力、延性比和能量耗散系數(shù)，對此種節(jié)點的受力特點及破壞模式進行了深入的探討。試驗表明：節(jié)點的最終破壞模式為中柱與弦桿翼緣交界處發(fā)生剪切破壞，同時伴隨著混凝土的拉裂。加載過程中，節(jié)點剛度退化比較明顯，節(jié)點在最大剪切應變達到峰值后發(fā)生剪切破壞；彈性階段時，等效黏滯阻尼系數(shù)較小，隨著塑性的發(fā)展，等效黏滯阻尼系數(shù)逐漸增加，最終分別穩(wěn)定在0.4和0.27左右，節(jié)點具有良好的耗能能力。
［關鍵詞］轉換桁架； 擬靜力試驗； 滯回曲線； 耗能性能
中圖分類號： TU393 文獻標識碼： A文章編號： 1002-848X(2016)S1-0542-06
Research on the hysteretic behavior of transfer truss joint in Shanghai Changning Raffles City
Wang Fei1, Yang Yimeng1, Wu Jing1, Zhang Shiyu2, Zhou Ying2
(1 China Shipbuilding NDRI Engineering Co., Ltd., Shanghai 200063, China;
2 State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)
Abstract: In order to test the dissipation capacity of transfer truss joint, the research of hysteretic behavior of transfer truss joint in Shanghai Changning Raffles City was carried out. The mechanical performance and failure mode was discussed by analyzing the bearing capacity, ductility ratio and energy dissipation factor of the joint. The test indicated that: the final failure mode is the shear failure on the interface between the middle column and chord flange, accompanying the crack of the concrete. In the loading process, the rigidity degeneration was obvious. Shear failure occurred when the maximum shear strain reached the peak value. In the elastic stage, the equivalent viscous damping coefficient is small, with the development of plasticity, the coefficient was increased gradually. In the last stage, the coefficient achieved stably at 0.4 and 0.27. The test indicated that the joint has a good performance of energy dissipation.
Keywords: transfer truss; pseudo static test; hysteretic curve; energy-dissipating capacity
作者簡介：王飛，博士，高級工程師, Email：flywang007@126.com。
