Impact Resistance Analysis of Prefabricated Reinforced Concrete Beam-column Joints
This paper mainly conducts impact load tests on reinforced concrete columns and prefabricated beam-column joints,and analyzes the crack evolution law,impact force time-history response and support reaction time-history response at reinforced concrete columns and pre-fabricated beam-column joints.The results show that the impact time-history response curves of reinforced concrete column and prefabricated beam-column joint show a law of fluctuating(pulse section)-stable(platform section)-fluctuating-stable.The impact load of the first pulse section of cast-in-place concrete beam-column joint is 33.7%lower than that of prefabricated beam-column joint.The peak impact force of the first pulse section is 4%lower than that of the prefabricated beam-column joint,and the peak impact force of the second pulse sec-tion is 20.8%lower than that of the prefabricated beam-column joint.In short,the impact resistance of precast concrete column members is greater than that of cast-in-place concrete column members,and its impact resistance is stronger and the damage degree is smaller.
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