Advanced Materials Research Vols. 1120-1121

Abstract: Interface bonding property of Mo-fiber reinforced polymer concrete not only depends on its material properties of components but also on microstructure characteristics of fibers including surface state, fiber content, fiber shape, bonding state between fiber and matrix, and so on. Interface bonding mechanism was firstly analyzed in the paper, and finite element simulation was employed to study the influence of fiber surface state, fiber number, bonding state between fiber and resin on interface property respectively. Research results show that the addition of Mo fibers can effectively restrain deformation of matrix, and scrap Mo fibers used as tool electrode material in Wire Electrical Discharge Machining before can improve interface bonding strength better than new smooth Mo fibers. With the increase of fiber number, deformation of the composite is decreasing. When fiber number is identical, maximum deformation of new and scrap Mo fiber-reinforced matrix in complete bonding state is respectively decreased by 12.6% and 14.5% on average compared with in complete debonding state.

Abstract: In order to realize the recycle of waste tires, rubber concrete can be utilized in road engineering. The bond property of interface between rubber concrete and matrix ordinary concrete is one of the key factors. This paper studied the interfacial bond property by splitting tensile strength test and shear strength test and considered several influence factors, such as rubber volume fraction, rubber particle size, interfacial roughness and curing time of matrix concrete. The results show that the shear strength decreases with the increase of rubber content, longer curing time of matrix concrete, and the larger size of rubber particle. The splitting tensile strength also deceases with the longer curing time of matrix concrete or smaller interfacial roughness. However, no regular relationship is found between the splitting tensile strength and the size of rubber particle or rubber volume content.

Abstract: This paper includes analysis on the recent advancement of glass fiber core based vacuum insulation panels (VIPs) in China, including the experimental development of mixed ultrafine fiberglass prototype core material consisting of Centrifugal and Aerocor glass wool mixture at different ratios. Pore sizes exhibited by these prototypes generally range between 15-25μm. Extensive centre of panel thermal conductivity (K_cop) were performed from which thermal performance graphs were extracted and analyzed prudently. K_cop analysis verified superior performance of the prototypes over traditional glass fiber core samples, hinting greater service life. The study concludes that in order to optimize the long term performance of current industrial glass fiber core material reduction of pore size at less than 10μm range as well as reduction of x-z axis fiber orientation angle to less than 450 would potentially decrease core structural sensitivity towards both gaseous and solid conductivity at increase of internal pressure.

Abstract: Due to mechanical performances of brace and steel plate, mechanical properties of semi-rigid joints and its construction and installation, semi-rigid steel frame-braced steel plate shear wall system is proposed. Nonlinear static analysis with parameters (thickness of plate, type of brace, size of brace and the ratio of span to height) changed of a single-span and single-floor semi-rigid steel frame-braced steel plate shear wall system illustrates that braced steel plate shear walls contributes obviously to bearing capacity and lateral rigidity of semi-rigid steel frame. Also, the finite element analysis (by ANSYS) show that semi-rigid steel frame-braced steel plate shear wall system has excellent ductility.

Abstract: A model with the ratio of 1:4 of a six layers’ semi-rigid steel frame-steel plate shear wallssystem has been tested on the shaking table.The strain variation of the steel plate shear wallsand the system’s seismic behaviors to different kinds of seismic waves from four different siteclassification and with different peakaccelerationwere analyzed to provide theoretical and experimental evidence to the real projects.