Applied Mechanics and Materials Vols. 501-504

Abstract: . Abstract. Tests on TCFT-WB, including 11 specimens with binding bars and 5 without binding bars under axial compression were carried out. The effects of parameters on the behavior of specimens such as failure mode, bearing capacity and ductility are analyzed to provide experimental data for the following research. The formula to calculate ultimate strength of TCFT-WB columns under axial compression are deduced from the constitutive relationship of TCFT-WB. The calculated results are compared with those calculated by FEM analyses, showing the proposed formula can give reasonable predictions on the ultimate strength of TCFT-WB stub columns under axial compression.

Abstract: The computation method for shallow shell of revolution in mixed finite-element formulation is developed. Final equations are constructed by the Galerkin method. Results of solution of test task are represented. Precision and convergence of results is analyzed.

Abstract: The piecewise continuum technique was used for the frame structure and a series-parallel system was taken for the mathematical model for the structure in which the deformation of floor slab had to be considered, and its state space equations were derived. Then the numerical solution of deformations and internal forces were obtained by using of state method. It is shown that the method of this paper has the advantages of less computation work and high precision.

Abstract: To study the ultimate bearing capacity of axial compression short column of double back-to-back C steel with gusset plates, the bearing capacity of seven short columns of this section type were analyzed by experiment and finite element analysis, the destroyed form of the composite columns were understood, the degree of influence of C steel type, plate thickness and plate spacing on mechanical performance of composite columns were got, some basis for the application of this type member in practical engineering were provided.

Abstract: Differential settlement may occur in structure foundations for the differences between vertical loads in different parts of the superstructures, or the differences between deformation features of the foundation soils. Then it is of great significance to develop new methods for controlling foundation differential settlement by using special materials, of which the deformation features can be controlled. Through the compression tests, settlement controllable materials can be selected by comparing the bearing capacity and deformation features of different materials experimented in the tests. According to the results of the compression tests in short term and long term, this article analyzed the bearing capacity and deformation features of different materials through the stress-strain curves. The research shows that XPS (Extruded Polystyrene) boards are of high bearing capacity, large strain property and long-term property stability, and are well suited to be used in civil engineering by controlling the differential settlement of the structure foundation.

Abstract: Ultra-high voltage guyed tower is typical structure of tall and slender, with the character of nonlinear and more sensitive to wind loads. Wind load is one of the most important control loads during design phase. A single-mast guyed tower recommended by a UHV DC transmission line was set as an example in this paper. The finite-element model of transmission tower-line system was built, based on Davenport, fluctuating wind velocity time-history was simulated, the result of wind-induced response was analyzed. The result indicates that, as for displacements of the nodes on guyed tower, the mean values of wind-induced response are greater than the displacements under the static equivalent wind loads. As for axial forces of the leg members on guyed tower, the axial forces under the static equivalent wind loads are less than the max values of wind-induced response.

Abstract: Due to the limitation conditions of computer hardware in the past, the structure members need to be simplified in order to save the computing resources during the finite element analysis (FEA). During FEA of Steel joints, the simplified model is considered as hinge joint, rigid joint or half-rigid joint, which is different with the actual force. With the improvement of computer technology and hardware, actual finite element analysis method (AFEA) is proposed in consider of influence of actual model, welding, plate size and bolts, which is a more acceptable method in Precision compared with last.

Abstract: As the most important component in steel structure engineering, the working dimensions and machining accuracy of junction plates often have to vary to suit the requirements of different structures and complex stress state. This thesis has presented a common design method which, by confirming all details of the plate, parameterizes its machining features including property, application range, contour, plate thickness, welding seam, arrangements of connecting bores, bore diameters and position, and makes flexible combinations to adapt to different linking patterns as orthogonal, oblique, slope changes, etc. The junction plate designed in this way has become an information model that covers all steps in junction plate designing.

Abstract: Due to web opening, stiffness and strength of steel beam decrease significantly. The common reinforcing method is setting stiffeners around the opening section; the paper presents two methods: herringbone stiffener and circular-arc stiffener. The finite element model is established with both material and geometrical non-linearity. Accuracy of the models is assessed by applying it to experimental results tested earlier by other researchers. Compared with other common methods, these two new methods are effective. Some reasonable suggestions are proposed for engineering application.

Abstract: For study of mechanical performance and bearing mechanism of the fabricated composite floor consisting of thin-walled steel beams and lightweight aggregate concrete panels, the static load experiment of a composite floor was finished and presented. The specimen is simply supported at the two shorter sides and the other two longer sides free. The equivalent uniform loads are applied to the floor through setting the load blocks on the supper surface of the floor. The vertical displacements and strains of the specimen were measured and analyzed. The experimental results show that the new composite floor has greater bearing capacity and better elasticity. It is concluded that although there is combined action between the main beam and the concrete panel, there is also evident slip between top flange of the main beam and the concrete panel.