Papers by Keyword: Frame Structure

Abstract: This paper uses time-history analysis method to consider the effect of 3 kinds of seismic waves by means of finite element software Ansys, analyse earthquake response of 5 kinds of models, compares effect of structural performance of frame structures with different types of stairs. The results show that different types of stairs diversely affects period, stiffness, mode of vibration, mechanical performance, etc, after consideration of stairs in calculating. Although types of stairs different, it shows mainly that stairs make much larger contribution for stiffness parallelled to stairs, less contribution for stiffness perpendicular to stairs, each layer just affects stiffness this layer. It is not simple to consider different types of stairs as general supports.

Abstract: This article mainly focus on the research in two-way horizontal earthquake under the action of 5-layer reinforced concrete frame structure optimization analysis. This research utilizes ANSYS software to realize parametric modeling. By using beam and column section sizes as design variables and tructural strength, stiffness, the maximal displacement between the layers as well as reinforcement component limit as constraint conditions, with overall minimum cost as objective function, it has carried on the static analysis, seismic response spectrum to structure analysis and optimization analysis on structures.Also, cross section change has been compared before and after the structure optimization to find out whether structure of various important parameters meet the specification requirements and and reflect the certain economy.

Abstract: Based on the ever finished investigations of physical and mechanical properties of recycled aggregate concrete (RAC), and a series of experimental studies on the durability, the fatigue behavior, mechanical behavior and the seismic behavior of RAC components. A full scale model of a one-storey block masonry structure with tie column + ring beam + cast-in-place slab system and a one fourth scaled model of a 6-storey frame structure, which are made of reinforced recycled aggregate concrete, are tested on a shaking table by subjecting it to a series of simulated seismic ground motions, and the seismic behaviors of the RAC structures were experimentally investigated. The dynamic characteristics and the seismic response were analyzed and discussed. The overall seismic performance of RCA structures are evaluated, the analysis results show that the recycled aggregate concrete structures with proper design exhibits good seismic behavior and can resist the earthquake attacks under different earthquake levels in this study. It is feasible to apply and popularize the RAC block masonry buildings less than 2 stories and the RAC frame buildings less than 6 stories in the region where the seismic fortification intensity is 8.

Abstract: Using finite element software SAP2000 solid model element to simulate the infill walls filled wall by the elastic conditions, and to simplify the calculation model, the use of elastic mechanics calculated infill wall subjected to earthquake plane wall crack development trend of the structure designed to prevent cracks in the wall of the measures will certainly help.

Abstract: In the design of base isolated structure, the parameter of seismic isolation layer is very important. At this problem, taking the reinforced concrete frame structure for example, using ANSYS software, the paper analyzed the dynamic characteristics of the base isolated structure, focused on the relation of the elastic stiffness of isolation layer and the isolation effects, and provided reference for reasonable selection of seismic isolation layer parameter.

Abstract: The multi-storey reinforced concrete frame structure whose frame has been added with a kind of unsymmetrical K-type friction energy dissipation brace is taken as an example in this article. The time history analysis of different angles of unsymmetrical K-type friction energy dissipation brace and symmetrical K-type friction energy dissipation brace under the rare earthquake has been done by using the finite element software SAP2000. The analysis and comparison on the seismic performance shows that symmetrical K-type friction energy dissipation brace under certain conditions. Plan layout could be more flexible by using the result obtained which could become a reference for design in days to come.

Abstract: For frame structure, due to the uneven settlement of foundation, makes the whole framework of system with initial stress caused by uneven displacement, thus produce unfavorable influence on seismic performance of frame structure. By PMCAD modeling software and finite element module SATWE, analyse the initial stress effect on seismic performance of frame structure.Results show that under the influence of initial stress, the frame structure seismic performance declined.

Abstract: Light steel temporary building is commonly used in the construction site, with advantages on simple structure, repeat used and small deadweight. For light steel temporary structure building there are still not enough researches on the mechanical properties and mechanism of action, and there are still not enough relevant standards and requirements to conduct the design and construction of the buildings. In order to precede to theoretical study on frame structure of light steel temporary buildings a method by Finite Element Analysis was proposed. This method is based on FEA software, Ansys. Using this method a monolayer frame structure and a two-story frame structure and a trilaminar frame structure model were analyzed. The calculation results of horizontal displacements under design loads by FEA were obtained and discussed.

Abstract: In order to verify the accuracy of estimation theory on cables parameters in prestress-mega-brace steel frame structure, several groups of structure models were designed, and the comparison between numerical analysis and estimation theory was completed, further the cause of large error between them was found out, at last correction formula was put and verified by numerical tests. The study shows that cable parameters of this new structure are sensitive to the side columns axial deformation, and the accuracy of correction formulas is greatly improved owing to considering the influence of side columns axial deformation.

Abstract: Recently, earthquakes occurred frequently, and our country has established a new seismic code. As the seismic intensity increases, some low frame structures cannot reach the requirements of layer displacement, layer displacement angle, stability, etc. Thus, they require reinforcement. The shear wall is good for resisting lateral force, and rational shear wall can control the shifting and shaking efficiently, thus making the distribution of internal force more reasonable. Through analysis on reinforcement and reconstruction method of adding shear walls for multi-story frame structure, the rules in terms of different layer displacement, layer displacement angle and overturning moment are found out, and the added shear wall, which can efficiently improve seismic fortification intensity, can serve as the main component for resisting lateral force. The conclusions are as follows: under earthquake action, through the method of adding shear wall, the deformation, layer displacement and layer displacement angle can be controlled effectively. Besides, the integrity and seismic behavior are inhanced, achieving the goal of improving anti-seismic grade of structure.