Experimental research on the seismic performance of reinforced reactive powder concrete frame joints

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (6) : 149-156.

WANG Dehong1, JU Yanzhon,2, ZHENG Wenzhong1

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Abstract

To study the seismic behavior of frame joints made of reactive powder concrete with ultrahigh strength, toughness and durability, 4 reinforced reactive powder concrete beamcolumn joints were tested under cyclic loads simulated seismic load conditions. The failure patterns, seismic bearing capacity, hysteretic characteristics, ductility, energy dissipating, strength and rigidity degeneration of the reactive powder concrete frame joints were analyzed. The test results show that, the shearcracking strength of the reactive powder concrete specimens is higher, and the development of surface crack exhibits the characteristics of multiple fine cracking and a little concrete spalling, and the specimens remain as an integral whole as the loading ends．The strength and rigidity degeneration rates are small. The deformation capacity and energy dissipation are well. When the failure is occurring, the shear deformation is the double of that under the peak load, and the averaging equivalent viscous damping coefficient of specimens is 0.137, which is higher than the equivalent viscous damping coefficient of normal and highstrength concrete joints. The use of reactive powder concrete can improve the seismic performances of frame joints, including the shear ductility, energy dissipation capacity and so on, and reduce the stirrup ratio in joint core, which is conducive to the construction.

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interior frame joints / reactive powder concrete / seismic performance / quasi-static test

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WANG Dehong1, JU Yanzhon,2, ZHENG Wenzhong1. Experimental research on the seismic performance of reinforced reactive powder concrete frame joints[J]. Journal of Vibration and Shock, 2018, 37(6): 149-156

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