高延性混凝土加固震损古旧砌体抗震性能试验及恢复力模型研究

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Abstract In order to study the seismic performance of high ductile concrete (HDC) reinforced seismically damaged and ancient masonry, six the seismically damaged and ancient masonry specimens strengthened by HDC were tested under low cyclic loading, the influence of factors such as the total area of HDC reinforced surface, the strength of masonry mortar and the number of openings on the seismic performance indexes such as failure characteristic and hysteretic curves were studied. The test results show that the peak load of the ancient masonry strengthened with HDC can be increased by 313.4% and the ductility displacement coefficient can be increased by 151.3%. On this basis, considering the mechanical characteristics of ancient masonry specimens, the skeleton curve model, stiffness degradation rules and loading and unloading rules are obtained, and a three-linear restoring force model suitable for HDC strengthening ancient masonry structures is established. The results show that the restoring force model can reflect the relationship between load and displacement of ancient masonry structure strengthened by HDC under low cyclic loading. The three-linear restoring force model can be used for nonlinear analysis of ancient masonry strengthened by HDC under earthquake action.

Key words： high ductile concrete (HDC) seismic damaged and ancient masonry seismic reinforcement hysteretic curve three-linear restoring force model

Received: 11 November 2020 Published: 15 April 2022

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	Articles by authors
	KOU Jialiang1
	2
	FAN Mingyan1
	SUN Guoxing1
	ZHOU Heng3

Cite this article:

KOU Jialiang1,2,FAN Mingyan1, et al. Aseismic performance test and restoring force model of earthquake damaged ancient masonry strengthened with high ductility concrete[J]. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(7): 106-115.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2022/V41/I7/106

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