Applied Mechanics and Materials Vols. 405-408

Abstract: A relational expression of wavelet packet coefficients and power spectrum is derived based on the theories of wavelet packet analysis. The new expression is proposed to compute the power spectrum of wind-induced response of structures. Further, the approach is applied to the power spectral analysis of the response signals of a large-span roof structure, and the accuracy of spectral estimation for stochastic signals is verified.

Abstract: Today large concrete filled rectangular steel tube members are widely used in large-scale civil engineering. The influence of the concrete filled steel tube members to different types of the steel tube concrete structure, which are with different concrete strength grade, is different. The main factors influenced the flexural member of the concrete filled rectangular steel tube are analysed in this paper.

Abstract: Taking QTZ630 tower crane as the research object, this thesis will use parameter language APDL of finite element analysis software ANSYS direct modeling. Then set the basic parameters of the material, mesh, and finally conduct static analysis. Combining the actual situation, the normal operation of tower cranes in three different conditions of deformation and internal force is analyzed, the results show that three conditions of the maximum displacement and stress values to meet the design requirements specification and there is still a material balance itself.

Abstract: Using ANSYS parametric design language, a three-dimensional finite element model is developed to analyze the stress distribution and the strength of the mega columns for XRL West Kowloon Terminus. The detailed von Mises stress distribution in each column, vertical stiffener plates and the diaphragm plates is obtained. From the analysis, the phenomenon of stress concentration is obvious in both upper and lower diaphragm plates. The local value of von Mises stress in them is higher than the yield stress value, which must be avoided by more detailed local structural design.

Abstract: The four-storey reinforced concrete frame structure was analyzed by PKPM and Glodon software. This paper introduces the applied significance of HRB500 high-strength reinforced bars and the problems existed in the promotion process. It also analyzes the economic benefits of application.

Abstract: Using the test and finite element analysis methods study the load-displacement hysteretic performance of the widened beam flange connections steel frame under the low cyclic load. Results of the research show that under the low cyclic load, the plastic hinge of steel frame with widen beam flange connections can be moved out of the beam-column connection welding. And the centers of plastic hinge locate out of widened arc part, achieving the ductile design goals that avoid the brittle break near the welding seam at the end of the beam. The bearing capacity of the steel frame with widen beam flange connections has been improved, but the stiffness of the column web domain is relatively lower. So construction measures should be taken to reinforcing the column web domain.

Abstract: Magnetorheological Fluid Damper has recently received considerable attention. This paper is focused in typical models, the strongpoints and application status of magnetorheological damper. In the meantime, the paper introduce the basic working principle of the smart passive damper using magnetorlogical fluid damper and the Faraday law how to be used in the magnetorlogical fluid damper with the electromagnetic induction part.

Abstract: The article mainly introduces the concept, pile-body construction forms and characteristics of the push-extend multi-under-reamed, and it inquires into the development status and achievements of the pile at home and abroad. A reference will to be provided for further research of this type of pile.

Abstract: three bar stimulation method was adopted to build a differential equation about shear stress for U-shaped beam slab. Relative stress formula for simply supported beam which is subject to uniform load and concentrated load was obtained by solving and deducing differential equation.In order to compare with general beam theory simply,this paper introduced a concept of shear lag coefficient. Finally,combined with a actual example,after compared with measured value and other theoretical results,final result was satisfactory.

Abstract: Based on the finite element method, three models are built: classical solid model, potential flow model and a combination of fluid-structure coupling model. Based on the above model the damping mechanism of tuned liquid damper has been investigated. Study focused on classical solid model and the boundary constrained potential fluid model respectively. After the completion of the above calculation, the analysis of bidirectional fluid-structure interaction model being carried out with the implicit dynamics algorithm. The results shows the contrast of the dynamic response of structure in the hydrated and anhydrous state. The calculations show that: the additional water mass can effectively reduce the natural vibration frequency of the structure, and it also can effectively reduce the displacement and velocity response of structure under vibration loads.