Applied Mechanics and Materials Vols. 578-579

Abstract: This paper present some selected numerical results of a typical super-tall building based on a new Large Eddy Simulation scheme. The spatial correlation of local wind forces were presented and discussed in detail. The probabilistic characteristics of fluctuating wind loads were evaluated. Furthermore, the along-wind and across-wind spectral characteristics were studied and compared with the von Karman spectrum. The output of this study is expected to be of considerable interest and practical use to professionals and researchers involved in the design of super-tall buildings.

Abstract: The simple-supported beam bridge is a common structure form widely used in small and medium span bridges. When the span is longer, the maximum bending moment is accordingly bigger. The maximum positive and negative bending moment numerical of beam decreases obviously because of cantilever bridge with cantilever beams to reduce the amount of materials. This article analyzes the current commonly used cantilever bridge with large span. The two-span cantilever bridge is analyzed under various loads about the internal force according to the condition of the absolute value of the maximum positive and negative bending moment being equal. It carries on the contrast and analysis about simple-supported beam bridges and obtains the best location of the hinge in the cantilever bridge. Moreover, it provides some reference for the optimum design of similar bridges and projects.

Abstract: The prefabricated construction is widely used because of it has short construction period and can be produced automatic. It has become one of the research focuses of scholars domestic and overseas that how to connect the prefabricate components in the structure to ensure the stability of the whole structure and mechanical behavior. The connection forms of beam and column are overviewed, including the dapped-end connection, the corbel connection, the weld connection, the cast-in-situ monolithic connection, the ductile rod connection, and the pre-stressed fabricated connection. Finally, the problems needed to be further study in the future are discussed.

Abstract: In this paper we propose a new refined shear deformation plate theory. This theory possesses a series of desirable features, the most salient of which areas follows: (i) The loads, which are usually considered to be applied on the middle surface of the plate, are applied in this new theory on the top surface of the plate; (ii) The equations deduced provide the same order of accuracy as several theories with second order shear deformation effects; (iii) It constitutes a theory, in the sense defined by Love, since it gives easy expressions for application to problems in different fields in architecture and engineering.

Abstract: In shear wall structure with supporting frames, the whole structure' s bearing mechanism is greatly influenced by the opening of shear wall on transfer beam under vertical loads. In this paper, finite element analyses of bearing wall with different type of opening transfer beams subjected to vertical loads were carried out, the influences of opening on transfer beam and shear wall were studied, the stress distribution law and the position of the neutral axises of the transfer beams were presented. The analysis results showed that horizontal stress and the neutral axises of transfer beam change with opening ratio of wall.The points offered in the paper can be referred in shear wall structure with supporting frames design.

Abstract: The seismic performance of RC frame beam-column joints was analyzed by using ANSYS in the paper. Firstly, reasonable finite element models were established by comparing the result of numerical simulation to experiment. Thus the seismic performance of concrete frame joints strengthened by Sprayed FRP was studied, and influence on the seismic performance by different thickness, length of Sprayed FRP, and different axial pressure ratio of column were analyzed in the paper too. Studies showed that reinforcing the concrete frame joints with Sprayed FRP is effective.

Abstract: Effective flange width’s value of U-section steel-encased concrete composite beam was studied by ANSYS. Based on the static equivalent principle, the general rules of effective flange width changed with load are summarized by finite element analysis and considering the effect of 4 factors: width-span ratio, loading form, concrete thickness, and material strength including concrete strength and steel strength. The analysis results show that wide-span ratio and load form has a greater impact on the effective flange width; concrete thickness and material strength’s effects can be negligible.

Abstract: The dissertation studies the force and deformation features of the portal frame structure under the snow load and load combination. The double cross gable portal frame model was established by 3d3s software in the paper, and analyzed under snow loading according to the regulations of China, Europe and the United States respectively. And some suggestions were put forward on the design of light-weight steel structure in China according to the comparison and analysis.

Abstract: In this paper, we depart from the basic vibration equation deduced from Vibro sand tower structure recurrence formula. Using ANSYS finite element software to simulate the red sand of the top ten tower structural vibration modal. Of which the first two modal solutions in accordance with the conventional prismatic cantilever closer to theoretical calculations, the results of the finite element solution proved authentic, we provide a theoretical basis for the use of finite element methods for solving the structural problems of sand washing tower.

Abstract: Tunnel project plays an important role in many water conservancy and hydropower projects ,and a large number of water conservancy construction around the world in recent years promoting the rapid development of tunnel engineering theory and engineering technology. This paper intends to use the theory of hydrodynamic pressure Westgaard.HM hedge sand tower structure theory for simple analysis through water structure and anhydrous structural dynamic analysis and comparison to check their stress and strain and displacement of vibration in the water.