Applied Mechanics and Materials Vols. 204-208

Abstract: Effective simulation and analysis about wind turbine foundation simplified model experiment were conducted by using general finite element analysis (FEA) program ANSYS. Nonlinear finite element model with surface-to-surface contact pair was built to study the strain distribution of the steel interface and slip between steel and concrete. Relevant strain and spreading length curves under the load of every class were obtained. The numerical simulation results were in good agreement with the experimental results. And proper parameters of bond-slip relationship for steel and concrete in wind turbine foundation were confirmed. The finite element model established and analysis results can provide a theoretical reference for later research, and have significant value for optimal design of wind turbine foundation.

Abstract: In practical engineering design, torque is always ignored for the design of the crossing cantilever beams with equal spans, so that its safety reliability is reduced. Based on the theory of restraint moment, this paper deduces the simplified formula on the restrain moment generated among the crossing cantilever beams. At the same time, the application conditions of calculation formulae of the crossing cantilever beams with approximate equal spans are suggestively given. By the contrast analysis, the influence factors of torque are proposed in conception design and it is proved that the formula can be used in engineering design.

Abstract: Based on the structure and mechanical characteristics of large-sized multi-grooves rectangular aqueduct, the author deduced the calculation formulas of transverse elastic reaction force of double-body and three-body aqueducts with the conditions of elastic supporting by using the force principle in the method of structural mechanics; meanwhile, used 3D Finite Element Method to model and analyze the aqueduct; and contrasted the two calculated results to prove the accuracy of the obtained formulas. The conclusions show that calculating aqueducts with the formulas can meet the precision requirements of engineering design. It provides a simple and quick method for the design and construction in practice.

Abstract: The Effect of slab quality on the microstructure and performance of Q345C hot rolling strip for pipe pile foundation were studied by SEM, EBSD, mechanical test and corrosion test. The results showed that the dendrite size of the slab had a great impact on the grain size of the steel. The fine grain structure can significantly improve the mechanical properties of the steel, but to some extent, reduce its corrosion resistance. In the early and later stage of the corrosion reaction, the coarse grain structure can improve the corrosion resistance. However, in the middle stage of the corrosion reaction, the grain size had no significant effect on the corrosion resistance. The rust layer included the inner layer and the outer layer, in which the inner layer was relatively compact, and they were mainly composed of the oxide of iron.

Abstract: Using the finite element analysis software ANSYS to analyze the overall dynamic response of one specific high-rise steel-frame,including modal analysis, spectrum analysis and time-history analysis. Then do a comparative analysis with the results of calculation by the professional software PKPM. As the results: the structural calculation can use layer model; Larger mutations appeared in the stress of weak-story and the relevant story need to reinforce or set up supports under the anti-seismic design in the elastic time-history analysis of structure; Y-direction translation is preferentially happened in first order modal shape and lateral-torsional coupling happened in third order modal shape among the vibration mode analysis; The response spectrum analysis of frequent earthquake show that seismic action is more serious in ground layer.

Abstract: Snow load is very important for the design of the large span roof structures in the cold region. The determine of the snow loads are influenced by many factors, such as wind, shape of the roof , terrain categories and so on, therefore comprehensive consideration of the transport and drift by the strong wind for design of the roof is very complex. Compared with other countries load codes, the China load code don’t detailed consider wind and snow interaction effect, the method of snow load for design has some further improved terms.

Abstract: Tube-plate joint is a frequently-used joint type in steel-tube tower, but the theoretical analysis and experimental investigation on tube-plate joint are absent both at home and abroad. In this paper, the ANSYS finite element program was used to simulate the bearing capacity and deformation condition of tube-plate joint with 1/2-stiffening ring. Eight calculation models were designed, and the width-thickness ratio was changed by changing the width or thickness of stiffening ring. The results indicate that the influence of different width-thickness ratio on tube-plate joint bearing capability is significant. By increasing the width or increasing the thickness of stiffening rings to improve the bearing capacity of the joint is a very effective way.

Abstract: Hybrid coupled shear wall system with steel coupling beams has known as the effective lateral load resisting system for tall buildings subjected to earthquake. This paper addresses the influence on horizontal ties of steel coupling beams in pseudo strain hardening cementitious composite (PSH2C) hybrid coupled shear wall. Test variables included the connection detail and types of material, concrete and PSH2C, in the connection region. The results show that Specimen PSH2C-SB and PSH2C-SBVRT exhibits a better stable behavior than Specimens HCWS-SB and HCWS-SBVRT.

Abstract: Abstract: The material parameters and the load are considered interval uncertainty and regarded as interval variables in this paper. The interval finite element analysis model is established for engineering structures. The interval parameter perturbation method and endpoint combination method based on monotonic are used to calculate deformation range. Sensitivity on the material parameters and load is studied.as an example for truss structure, the conclusion is more reasonable and applicable.

Abstract: In view of the problems of crack and falling off when using ordinary mortar aerated concrete blocks, this paper investigate the plaster mortar of sand aerated concrete blocks. On the basis of single factor experiments of the effects of plaster mortar composition on its performance, the properties of plaster mortar are optimized by orthogonal experimental method. The results indicate that the mixture of vitrified microbeads, perlite, fly ash according to a certain proportion can produce laying and the plaster inorganic insulation mortar that exhibit low thermal conductivity coefficient and mechanical performance that meet the requirements.