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Experimental investigation on seismic behavior of cavity wall strengthened with ECC splint

ZHOU Tiegang;LIU Bo;DENG Qingxuan;DENG Mingke;ZHANG Shuangke;Xi′an University of Architecture and Technology;  
With high strength, ductility and good bonding properties during the cement hydration process, high ductility fiber reinforced engineered cementitious composites(ECC) have a wide application prospect in masonry reinforcement engineering. The tests of two unreinforced cavity walls, two strengthening specimens with single ECC splint and two strengthening specimens with double ECC splints were conducted under in-plane cyclic loading. After the comparison of the failure mode, hysteretic curve, stiffness degradation, bearing capacity, and ductility of the single and double ECC splints strengthened cavity walls were analyzed to investigate seismic performance of strengthening ECC splint. The ABAQUS software was used to verify the test by comparing the experimental values and calculated values. The results show that the bonding properties between the ECC splint and the cavity wall are reliable, which illustrates that the superior material resistance can resist horizontal shear loads on cavity walls. The ultimate deformation and load bearing capacities of the single/double ECC splint strengthened cavity walls are largely improved, and the ductility and seismic performance of the strengthened specimens are also improved. The calculated horizontal shearing loads by the finite element analysis is almost matched with the experimental values.
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