Applied Mechanics and Materials Vols. 578-579

Abstract: For studying the influence of eccentricity e on autoclaved fly ash solid and perforated brick masonry. Adopted method is that eccentric compression tests were conducted on 24 autoclaved fly ash solid brick masonry samples and 24 autoclaved fly ash perforated brick masonry samples. The damage patterns and test results are comparative analyzed. The experimental results indicate that the strain distribution in section accord with plane section assumption and the eccentric compressive capacity decreases proportionally as e increases. In conclusion, The limit value of eccentricity e are given.

Abstract: A suspended ventilated façade is the most efficient solution to insulate and improve aesthetics of both a refurbished and a newly built building. Today, a wide variety of rainscreen cladding systems exist, offering different bearing structures, cladding subframes and cladding materials. Composite cladding is the most widely used.

Abstract: The fastening tube high-formwork supporting system of a hotel in SuZhou was taken as an example to investigate the key problems of stability, strength and stiffness existing in fastening tube high-formwork supporting system design. Through design calculation and construction measure, the safety of fastening tube high-formwork supporting system is guaranteed, and to provide the engineering reference for fastening tube high-formwork supporting system.

Abstract: The paper investigates the dynamic stability of thick functionally graded plates subjected to aero-thermo-mechanical loads, using the moving least squares differential quadrature method. Temperature field is assumed to be a uniform distribution over the plate plane, and varied in the thickness direction only. Material properties are assumed to be temperature dependent and graded in the thickness direction in the simple power law manner. The equilibrium equations governing the dynamic stability of the plate are derived by the Hamilton’s principle, then these equations are discretized by the moving least squares differential quadrature method. The boundaries of the instability region are obtained using the principle of Bolotin’s method and are conveniently represented in the non-dimensional excitation frequency to load amplitude plane. The influence of various factors such as gradient index, temperature, mechanical and aerodynamic loads, thickness and aspect ratios, as well as the boundary conditions on the dynamic instability region are carefully studied.

Abstract: A test of the flexural behavior of concrete beam strengthened with sand-coated screwed CFRP bars was carried out to analyze the bending performance and cracking development process under staged loading, and different stage of crack distribution was plotted. Based on the test results, this paper discussed the crack mechanism and cracking feature of CFRP bars concrete beam under the load, and influencing factors of crack width and crack spacing were analyzed. Finally, calculation method of crack width was presented.

Abstract: Taking the optimization of steel reinforced concrete frame structure as background, the searching and optimizing of structural were taken as optimization objectives by introducing failure modes. Incremental dynamic analysis (IDA) was used to search the seismic wave, which had important significance of the structure, thus, the failure modes under the seismic waves could be obtained. And three optimization methods were proposed. Finally, an example was analyzed to verify the rationality of the proposed optimization thought and method.

Abstract: Based on the model experiment on seismic behavior of a 1-span, 2-story concrete-filled rectangular steel tubal (CFRST) frame under lateral cyclic loads, a 3-D nonlinear finite element model of concrete-filled rectangular steel tubular frame is proposed in the paper. Compared with the experimental hysteresis curve, the computational results are found to be accurate, which shows that this model proposed in the paper can be applied in structure analysis of concrete-filled rectangular tubular frames. So the model was used in the finite element analysis of concrete-filled rectangular frame with different axial load level. Compared the computational displacement envelop curves, it concludes that the ductility and bearing capacity of CFRST frames reduces with the increasing axial load level.

Abstract: Mechanical testing on the first group of ordinary brick wall-beam and second group of recycled brickbat concrete wall-beam, measured its ultimate load and the maximum deflection, establishing finite element model to analyze, and comparing with the test results. It will be show that under the action of ultimate load, friction coefficient between the upper-wall of the wall-beam and joist can be desirable between 0.35 ~ 0.45, and the friction coefficient of recycled concrete wall-beam is bigger than ordinary wall-beam, and the higher the intensity of the upper-wall is, the bigger its friction coefficient is, as well as the greater stiffness of the wall-beam is.

Abstract: Mobile steel building is a prefabricated building built in a factory, with advantages on moving conveniently, simple structure and scalability. For mobile steel buildings there are still not enough researches on the mechanical properties and mechanism of action, and there are still not enough relevant standards and requirements to conduct the design and construction of the buildings. In order to precede to theoretical study on steel frame structure of mobile buildings a method by Finite Element Analysis was proposed. This method is based on FEA software, Ansys. Using this method a two-story frame structure model was analyzed. The calculation results of lateral deformations under design loads by FEA were obtained and discussed.

Abstract: The force behavior of parallel double coupling beams (PDCB) with different width is analyzed, based on which the feasibility of this kind of beams is discussed. The loading process of the PDCB is simulated by using finite element software ABAQUS. By analyzing the hysteretic loops, skeleton curves, energy dissipation coefficient, equivalent viscous damping coefficient and ductility coefficient,the bearing capacity and seismic performance of the PDCB is studied. Through simulation, it shows that the hysteretic loops is plump, and the energy dissipation coefficient, equivalent viscous damping coefficient and ductility coefficient of this double beams is high. It can be concluded that the PDCB has good force behavior, and the beams of PDCB can work in coordination.