Applied Mechanics and Materials Vols. 256-259

Abstract: The axial stress and axial displacement distribution curves of reinforced mixing single pile are researched by ANSYS software; and the differences of the single pile ultimate capacity of reinforced mixing pile between different core pile length and area replacing ratio are analyzed; It compared and analyzed envelope diagrams of bending moment and shear of reinforced mixing pile in different core pile length and area replacing ratio under seismic response. Some conclusions which may be of some value for design and construction of reinforced mixing pile composite foundation are drawn

Abstract: Multiple eco-composite wall is one of the most commonly used lateral-load resisting member in eco-composite wall structure. The main influencing factors of shear capacity for the wall are analyzed. Based on this, the shear capacity formula of multiple eco-composite wall is put forward and the application scope of the formula is discussed. In addition, a satisfactory agreement is obtained from the comparison between the values from the formula and experimental results. Theoretical research and test analysis show that the shear formula of multiple eco-composite wall is valuable for theoretical analysis and practical application.

Abstract: The structural measures about puting the additional energy dissipation plat at the bottom of the CFST columns where bears more stress, was proposed to improve the seismic energy dissipation performance of concrete filled circular steel tubular (CFST) columns. Selecting the axial compression ratio and height of the energy dissipation plate as parameters, finite element anylsis of 8 circular CFST columns with different structural measure were performed. On the basis of finite element anylasis results, this paper, which obtained load-displacement curves of each finite element model, analyzed and compared the bearing capacity of each model. The results show that: comparing to the ordinary circular CFST columns, the columns with energy dissipation plat show much better performence about bearing capacity and seismic capacity, the height of the energy dissipation has a great effect on bearing capacity but the bearing capacity is inversely proportional to the axial compression ratio.

Abstract: In order to find out the limit depth that locally damaged submarine can dive, the model of ring-stiffened cylindrical shell with local indentation was proposed. The limit load of model were calculated and compared with ideal ring-stiffened cylindrical shell. In order to assess the residual limit load of the ring-stiffened cylindrical shell, a residual limit load coefficient is proposed and a series of curves of the coefficient are drawn.

Abstract: This study is devoted to introducing a novel structural wall reinforcement technique, called JK panel. JK panel is a specific 3D steel mesh with vertical and diagonal strips. The main feature of JK panel is its interconnected nature and closely spaced strips that leads to a high confinement for concrete. During this study, using finite element technique, behavior of JK panel is evaluated under monotonic loading. The main emphasis of the current study is on advantages of JK panels as shear wall reinforcement. Therefore, some different reinforcement details are compared with JK panel for one single wall constructed with lightweight EPS concrete. According to obtained results, JK panels can satisfactorily reinforce any concrete wall while they need lower development lengths and they have more redundancy and reliability compared to conventional separated rebars.

Abstract: The randomness of value of tuned sub-structure mass and rigidity is comparatively large because of the needs of actual projects. Based on the dynamic characteristics and reliability of MSCS, the seismic response of the mega structure and the overall failure probability are discussed with the value of tuned sub structural mass and rigidity under different seismic intensity. It is shown that tuned sub structural mass and rigidity have significant affection on the overall reliability of structure, and seismic intensity has not interfere this regular pattern. Therefore, structural parameters of optimization which are referred to the regular pattern should be considered in the actual design in order to further enhance seismic capability of MSCS.

Abstract: In order to ensure the mechanical stability of outdoor vacuum circuit breaker, it is quiet necessary to study on the change of the mechanical behavior caused by the structural deformation during installation. A model of outdoor ZW32 vacuum circuit breaker is created by a three-dimension design software. Using the finite element analysis software to emulate whether the sliding chute on the bracket would be deformed when the box of circuit breaker has structural deformation. The result shows that the deformation would occur. Besides, after the circuit breaker keeps working for a period of time, the lubricant on the sliding chute decrease. So the drive rod and the operating system can't slide smoothly in the deformed sliding chute. As a result, the mechanical property of the circuit drops in a large extent and it cannot run smoothly.

Abstract: The paper established 3-D finite element model, studied the response pattern of rigid pile composite foundation under earthquake loading with time history analysis method. According to similarity theory, this paper established rigid pile composite foundation pile group model, analyzed the response pattern of it with pseudo-dynamic test methods. And compared and analyzed the results which were obtained by different methods, based on these analyses, some conclusions which may be of some value for anti-seismic design of this type of composite foundations are drawn

Abstract: Bolted steel-wood-steel connection is an important fashion of connections in timber structure, the manners of failure loaded parallel-to-grain include bearing, row shear-out, group tear-out and splitting, and the brittle failure modes are predominant in some tested results of bolted connections specimens. End distance, bolt spacing, row spacing and the thickness of wood have important influence on the failure modes, and meanwhile, the bolt diameter can not be neglected. Based on the different failure fashion, the equations of strength were given.

Abstract: This paper reports on the development and testing of a new concrete-filled fiber reinforced polymer (FRP) tube (CFFT) system. The CFFT system was designed to enhance the effectiveness of rectangular FRP tubes in confining concrete. The technique used in the development of the CFFT system involved the incorporation of an internal FRP panel as an integral part of the CFFT. The performance of the system was investigated experimentally through axial compression tests of six unique CFFTs. The results of the experimental study indicate that the new CFFT system presented in this paper offer significantly improved performance over conventional CFFTs with similar material and geometric properties. Examination of the test results have led to a number of significant conclusions in regards to confinement effectiveness of each new CFFT system. These results are presented and a discussion is provided on the parameters that influenced the compressive behavior of the new CFFT system.