Experimental Study On Seismic Behavior Of Full-scale Precast Shear Wall Box Module

Industrialization is a tendency for the construction of civil buildings. In China, the precast shear wall structure is an effective way to promote industrialization. The realiability of connection between shear walls decides the structural integrity and seismic behaviors, so it is the key technology to the precast shear wall structures. This thesis is based on the program of “A Set of Technology Study and Engineering Application Examples for Building Industrialization in Yunnan Provience”. The design and engineering application characteristics of the affordable houses have been taken into consideration. This thesis proposed a connection technology characterized with“vertical reinforcements spliced indirectly by one single row of steel bars centrally grouted in sleeve in horizontal joint connections”. The realiability and sesmic behaviors of the proposed connection technology are then experimentally studied by quasi-static tests. After that, a pseudo dynamic test on a full-scale precast shear wall substructure equiped with the proposed connection is conducted. The major contents of the present thesis are listed as follows:(1) A shear wall specimen with vertical reinforcements spliced indirectly by one single row of steel bars centrally grouted in sleeve in horizontal connections and a cast-in-site concrete shear wall specimen are investigated with quasi-static tests. Experiment results show that its failure pattern and Peak load-carrying capacity of the speciman is similar to the cast-in-site one, the interstory drift angle reaches up to 1/56 and it’s energy dissipation and durability are also found superior. Failure due to insufficient anchorage is not observered in the connections. Experiment results validate the connection realiability.(2) A shear wall specimen with stirrup bolted by vertical reinforcement in vertical connections and a cast-in-site concrete shear wall specimen are then investigated with quasi-static tests. Experiment results show that the interstory drift angle is 1/55, which is consistent with the cast-in-site one. The test results also indicate that the bearing part experiences a convert from the entire shear wall to the slit walls. In addition, it’s energy dissipation capacity and durability is found maintained, and the load-carrying capacity is decreased. Experiment results demonstrate that the specimen with stirrup bolted by vertical reinforcement in vertical connections exhibit excellent performance and no conncetion failure is observed and the the connection realiability is confirmed.(3) A pseudo dynamic test on a full-scale 2-story precast shear wall substructure equiped with the proposed connection is conducted to comprehensively investigate the sructural intergrity and semsic behaviors. Experiment results show that when suffer from the 8 degree earthquake, the structure remains elastic and the interstory drift angle is 1/9118, less than the limitation of comfort drfit angle(1/1000); when suffer from rare earthquake, the interstory drift angle is 1/170 and satisfies the limitations of the elastic-plastic displacement angle(1/120); when suffer from the 9 degree rare earthquake, the structure did not collapse or exhibited severe any damage. The pseudo dynamic test result indicate that the connection proposed in the present study show intergrity and reliable performance under seimisic loads and satisify the three-level performance target of “no damage under minor earthquake, repairable under moderate earthquake, no collapsing under rare earthquake”.