Papers by Author: Ping Wang

Abstract: According to the principle that fiber resist crack and cement-based capillary crystalline impermeability, the paper chose the mortar added with polypropylene fiber and SJ capillary crystalline material as the research object. Experiments on mechanical properties, crack resistance and impermeability of mortar were conducted with one material being added to the mortar as well as both materials being added to. The test results indicate that the ratio of compressive strength to flexural strength of mortar could be reduced, the time of cracks occurrence in mortar matrix would be delayed, and the minimum cracking coefficient can amount to 5% on the condition that the two materials are both added to the mortar, moreover, the mortar’s first and second impermeability is significant. Furthermore, the paper also discusses the mechanism of mortar’s crack resistance and impermeability which is mixed with polypropylene fiber and capillary crystalline material.

Abstract: This paper present a new seismic isolation device which assembled sliding friction, energy dissipation and limit, then clarified the work performance and the optimization of its design ideas. The author utilized FEM analysis software ANSYS to establish a parametric model, taking the working condition of single-ring and stress concentration distribution under the yield state as the research object, the shape of the energy loop was optimum designed, and the hysteresis energy consumption performance of seismic isolation bearings was analyzed before and after optimizing. It can be received that energy consumption performance of the seismic isolation bearings improved 32.7% after optimizing. A 6 layer frame structure FEM model was built, at this basis, the seismic responses of fixed structure and sliding seismic isolation structure of foundations were compared. The results indicated that the seismic responses of sliding structures decreased significantly.