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(1 同濟(jì)大學(xué)建筑工程系, 上海 2000092; 2 同濟(jì)大學(xué)土木工程防災(zāi)國家重點(diǎn)實(shí)驗(yàn)室, 上海 200092)

[摘要] 研究了一種具有自回復(fù)能力的圓管柱-H型鋼梁節(jié)點(diǎn)的力學(xué)性能。該節(jié)點(diǎn)在梁柱間通過奧氏體鎳鈦形狀記憶合金螺桿連接，并通過形狀記憶合金螺桿的超彈性來使得該節(jié)點(diǎn)在震后具有自回復(fù)能力。采用通用有限元分析軟件ANSYS 14.5建立節(jié)點(diǎn)模型, 對此節(jié)點(diǎn)進(jìn)行了循環(huán)加載以驗(yàn)證節(jié)點(diǎn)的自回復(fù)能力。研究表明:這類節(jié)點(diǎn)具有一定的耗能能力。在相對位移轉(zhuǎn)角達(dá)到5%的情況下, 主體結(jié)構(gòu)中的梁和柱仍保持彈性。地震作用后，節(jié)點(diǎn)可以回復(fù)到其初始位置而沒有殘余變形。

[關(guān)鍵詞] 圓管柱-H型鋼梁節(jié)點(diǎn); 形狀記憶合金; 參數(shù)化分析; 預(yù)應(yīng)力; 自回復(fù)

中圖分類號：TU391

Investigation on the self-centering capability of an novel H-shaped beam to tubular column connection

Shao Hongliang¹ , Wang Wei^1,2

(1 Department of Building Engineering, Tongji University, Shanghai 200092, China;

2 State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)

Abstract：This paper investigates the structural performance of a self-centering H-shaped Beam to Tubular Column Connection. This connection uses austenite Ni-Ti shape memory alloy (SMA) tendons to connect beams and columns. The super-elastic SMA tendons provide self-centering capability after earthquake. A general FEM analysis software - ANSYS 14.5 was adopted to model this connection subjected to cyclic loading. This study indicates that the connections have a moderate energy dissipation and ductility capacity. Moreover, under 5% inter-story drift, the column, beam and endplates all remain elastic. Upon unloading, the connections have no residual deformation, and they can be recovered to their original condition.

Keywords：H-shaped beam to tubular column, shape memory alloy, parametric study, intial pre-stress, self-centering 

參考文獻(xiàn)

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