Pore-forming grouted connection characterized with great economic superiorities and application potentials has weaker mechanical properties comparing to the steel sleeve grouted connector. To improve the mechanical properties of pore-forming grouted connector, the NPGCS was generated using welded closure confinement steels in buckle configuration. Experimental tests and finial element analysis of two NPGCS precast shear wall specimens and one cast-in-situ shear wall specimen was carried out to test mechanical performances. Results indicated that the mechanical properties of NPGCS can match the connection requirements even under the adverse effects from grouted interface gap opening and slip. Contributing to the excessive confinement steels, the mechanical properties of NPGCS specimens are better than that of the cast-in-situ specimen. So, according to the suggestions given out in this paper, the NPGCS can be widely applied into precast buildings in certain areas and conditions.

In this paper, we have studied the comfort of a newly-designed precast assembly floor evaluated by acceleration response under human-induced loads. The influences of five cases including different rows of connectors, walking frequency, population size, walking route and distribution of people on the response of the floor are discussed. The results are as follows. The removed connectors at the middle span produce greater effect according to the influence of different rows of connectors. Greater walking frequency produces greater effect according to the influence of walking frequency. Larger population size produces greater effect according to the influence of population size. Walking in the direction perpendicular to the longitudinal direction of slabs and through the low-order mode center produces greater effect according to the influence of walking route. The case that people are distributed on both of the two conventional slabs produces greater effect according to the influence of distribution of people. For all the cases, their influence degrees are in the order of different rows of connectors, walking frequency, distribution of people, walking route, and population size. Finally, basing on the five cases and according to the Chinese design specification on the natural frequency and peak acceleration, the authors analyzes the comfort of the floor by selecting the most unfavorable condition, and verifies that it satisfies the terms in the specification. The newly-designed floor can be used in the future design of buildings.