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In EVE precast shear walls, noncontact lap splices of rebars are used both in horizontal joints connecting upper and lower story precast panels, and in vertical joints connecting adjacent precast panels. To study the feasibility of the noncontact lap splice, joint construction details and prefabricated boundary element in EVE precast concrete hollow shear walls, quasi-static tests of three full scale wall specimens were carried out. Test results indicate that the rebars at the same location of precast panels and cast-in-situ holes exhibit a similar trend of strain development, and noncontact lap splices can transfer stress effectively through the truss model. All specimens fail in the expected failure modes, and the inside cast-in-situ concrete can work together with the precast panel. The ratio of the measured load-carrying capacity to the calculated capacity according to the formulas in current design code JGJ 3-2010'Technical specification for concrete structures of tall building' of the wall specimen with compression-shear failure mode is 1.77, while those of the wall specimens with the compression-flexural failure mode are 1.15-1.23, indicating that the formulas for integral casting walls in current design code can be used to evaluate the strength of EVE precast shear walls. The ultimate drift ratios of all the specimens are 1/66-1/54, satisfying the requirement of deformation capacity under rare earthquakes. The full-prefabricated boundary element with noncontact lap splices of vertical rebars and stirrups placed in precast panels, can be used to replace the partial-prefabricated boundary element with vertical rebars assigned from bottom to top and stirrups placed in the vertical hole. The horizontal joints exhibit a good slip-resisting ability. © 2020, Editorial Office of Journal of Building Structures. All right reserved.
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来源 :
Journal of Building Structures
ISSN: 1000-6869
年份: 2020
期: 2
卷: 41
页码: 32-41