Aseismic behavior of CFST diagrid tube structures

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (7) : 77-84.

SHI Qing-xuan, WANG Feng, SANG Dan, WU Chao-feng, WANG Peng

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Abstract

The models of concrete-filled steel tubular (CFST) diagrid tube structures were analyzed with the nonlinear static elastic-plastic time-history analysis method, the nonlinear dynamic elastic-plastic time-history analysis one and the software PERFORM-3D. The structural yield path, lateral displacement, floor drifts, shear hysteretic effect, oblique column damages and their distribution mode were studied. The results showed that CFST diagrid tube structures have a clear force transmission path, a larger lateral stiffness and better spatial working performances; the main and secondary nodes can effectively balance internal force differences of oblique columns, so deformations of node layers are smaller than those of non-node layers; shear hysteretic ratio of diagrid tube structures changes from positive values to negative ones along the floor’s height, the position of negative shear hysteretic ratio occurring for the first time drops with the development of structure’s plasticity; different earthquake waves and different acceleration response amplitudes have a larger influence on damage of oblique column layers, while they have a smaller effect on damage distribution mode of oblique column layers.

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concrete-filled steel tubular (CFST) / diagrid tube structure / aseismic behavior / nonlinear static elastic-plastic analysis / nonlinear dynamic elastic-plastic analysis

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SHI Qing-xuan, WANG Feng, SANG Dan, WU Chao-feng, WANG Peng. Aseismic behavior of CFST diagrid tube structures[J]. Journal of Vibration and Shock, 2018, 37(7): 77-84

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