Applied Mechanics and Materials Vols. 501-504

Abstract: For analysis of bearing mechanism of the composite floor formed with thin-walled steel and lightweight aggregate concrete, the static load test of a composite floor was put forward. The specimen is simply supported at the two shorter sides of the floor and the other two sides free. The uniform loads and partial loads are applied to the floor through load blocks. The vertical displacements of the floor, the relative slips of concrete panels and steel beam and strains of specimens were measured and analyzed. The results showed that the new lightweight composite floor has better bearing capacity and there was not cracks in lightweight aggregate concrete panels while the applied loads are much larger than the normal loads. It is concluded that variation of strains of secondary beams and concrete panels has similar development trend as the equivalent uniform load is close the value of 6 kN/m².

Abstract: For analysis of mechanical property and bearing mechanism of the composite floor consisting of cold-formed thin-walled steel beams and lightweight aggregate concrete panels, the static load test of a composite floor was presented. The floor specimen is simply supported at the two shorter sides of it and the other two sides free. The equivalent uniform loads are applied to the floor through piling up the load blocks on the supper surface of the floor. The displacements of the floor and strains of specimens were measured and analyzed. It is denoted that the vertical displacements of the floor varied linearly with the load while it is less than 8kN, but the slips of main beam and concrete panel vary nonlinearly during the whole loading process. It was seen that there were not evident cracks in the concrete panels while the applied loads are much larger than the normal loads.

Abstract: When steel plate shear walls (SPSWs) are fitted into a long-span truss system, horizontal and vertical deformation should both be considered to evaluate the seismic performance of the structure. Numerical analysis is conducted to study the seismic performance of stiffened steel plate shear wall with opening subject to horizontal and vertical loading respectively based on a project. Results of the analysis indicate that stress distribution and deformation patterns of SPSW with opening are quite similar under horizontal and vertical loading. Stiffeners around the opening should be stretched to full height or width of the SPSW and strengthened by using larger thickness or width. The grids at the four corners of the opening are recommended to be further strengthened by additional stiffeners. SPSW with opening exhibits good hysteretic performance and energy dissipation in both loading directions.

Abstract: In order to help engineers to better learn from accidents of reinforced concrete structures, accident identification and processing method, this article introduced the ideas of CBR to the accident case retrieval methods of reinforced concrete structures. At the same time, the fuzzy retrieval and knowledge index model of reinforced concrete structure accidents are presented. According to the approximate extent of construction conditions, the approximation of construction are determined, and similar cases with the current engineering cases then retrieved through the case of reinforced concrete structures, which the designer or construction workers can learn from.

Abstract: This paper used ANSYS finite element software to simulate the residual stress of the welded monosymmetric I-section and obtain residual stress distribution curves, analyzed the influence of flange width ratio on welding residual stress peak value and the stress distribution. The studies have shown that: with the flange width ratio decrease gradually, peak value of residual stress in flange and web is to increase; peak value of residual tensile stresses in both flange and web close to the steel yield strength f_y, peak value of residual compressive stresses is 0.4f_y in wide flange and the web near wide flange and in narrow flange and web near narrow flange is 0.3f_y; the distribution of the residual tensile stress in the flange and web have growth trend.

Abstract: Considering secondary load, simulate the axial compression process of reinforced concrete square columns strengthened with igneous rock fiber reinforced polymer with Abaqus. Make a comparison between the simulation result and experimental result. The finite-element model can simulate the experiment preferably. And the impact of lagged strain is very obvious.

Abstract: The interfacial slip between fiber reinforced polymer (FRP) and concrete beam is one of the key factors to affect the behaviors of FRP plate strengthened RC beams. Under external loading, the relative slip occurring on the interface between FRP plate and concrete beam causes the redistribution of stress and then the bearing capacity of the member is reduced. According to elasticity theory, this study analyzes theoretical analysis of interfacial slip. The analytical model is established, and the differential equations of interfacial slip of FRP plate strengthened RC beams are established. Using the boundary conditions, the calculated formulas of interfacial slip are deduced under uniformly distributed loads.

Abstract: Using static analysis method analyzes wind resistance of prilling tower. Calculated each axis and each node by force, define an array so that each node force and the corresponding values is in the array. Using loop statements for each node on the wind load, applying the load to solve, it is concluded each node in the displacement response under the action of wind load. Use MATLAB to get the result to get the need curve, and analyzes the results. Through the analysis of two kinds of structure of the prilling tower, and comparison, then conclusion, to see what kind of structural seismic prilling tower wind the better performance, and control specifications to see if it meets specifications.

Abstract: During erection of a rooflight steel structure excessive deformation started appearing in the steel structure designed for a rooflight. After repairing the load-carrying system it was necessary to check whether the structure was free of permanent deformations. The situation was consulted with the investor and it was proposed to carry out a load test which should prove that the real structure was in accordance with the computational model.

Abstract: Different temperature joint treatments in Changchun International Trade Center are discussed in detail in this thesis, and meanwhile the structure treatment of 25.5m-tall non-lateral support that is formed during the design of temperature joint structure is introduced in detail. The treatment introduced in this thesis has already been applied in the real construction practice.