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Meng-ting Tsai - One of the best experts on this subject based on the ideXlab platform.

  • determination of Initial Stiffness of timber steel composite tsc beams based on experiment and simulation modeling
    Sustainability, 2018
    Co-Authors: Meng-ting Tsai
    Abstract:

    Due to improvements in the use of recyclable materials in construction, timber–steel composite (TSC) beams demonstrate high potential for future construction. In this study, a proposed simulation modeling, which was adopted from the simulation modeling of a timber I-shape composite, was applied to estimate the Initial Stiffness of TSC beams. The strength of each beam could be determined once the Initial Stiffness was estimated. In addition, a series of experiments were performed to examine the accuracy of the proposed simulation modeling, including the effects of different shapes of steel members, fasteners, and applying and not applying a dowel connection. The results indicated that the simulation modeling could adequately determine strength at a deflection of 1/360 of the span. The ratio of difference between the experimental results and the simulation modeling results was less than 10% if a dowel connection at the web was applied. However, the ratio of difference reached 26% and 24% in the TSC beams without a dowel connection at the web that were fastened with screws and nails at the flange, respectively, revealing the importance of applying a dowel connection at the web. Moreover, the strength of the TSC beams with a dowel connection at the web that were fastened by screws was approximately 15% higher than that of TSC beams without screw fasteners. In conclusion, the proposed simulation modeling can provide designers with a method for estimating the Initial Stiffness and strength of TSC beams within a deflection of 1/360 of the span, supporting the future application of TSC beams in construction.

  • Determination of Initial Stiffness of Timber–Steel Composite (TSC) Beams Based on Experiment and Simulation Modeling
    MDPI AG, 2018
    Co-Authors: Meng-ting Tsai
    Abstract:

    Due to improvements in the use of recyclable materials in construction, timber–steel composite (TSC) beams demonstrate high potential for future construction. In this study, a proposed simulation modeling, which was adopted from the simulation modeling of a timber I-shape composite, was applied to estimate the Initial Stiffness of TSC beams. The strength of each beam could be determined once the Initial Stiffness was estimated. In addition, a series of experiments were performed to examine the accuracy of the proposed simulation modeling, including the effects of different shapes of steel members, fasteners, and applying and not applying a dowel connection. The results indicated that the simulation modeling could adequately determine strength at a deflection of 1/360 of the span. The ratio of difference between the experimental results and the simulation modeling results was less than 10% if a dowel connection at the web was applied. However, the ratio of difference reached 26% and 24% in the TSC beams without a dowel connection at the web that were fastened with screws and nails at the flange, respectively, revealing the importance of applying a dowel connection at the web. Moreover, the strength of the TSC beams with a dowel connection at the web that were fastened by screws was approximately 15% higher than that of TSC beams without screw fasteners. In conclusion, the proposed simulation modeling can provide designers with a method for estimating the Initial Stiffness and strength of TSC beams within a deflection of 1/360 of the span, supporting the future application of TSC beams in construction

Seungeock Kim - One of the best experts on this subject based on the ideXlab platform.

  • new equations for predicting Initial Stiffness and ultimate moment of flush end plate connections
    Journal of Constructional Steel Research, 2020
    Co-Authors: Zhengyi Kong, Shaozheng Hong, Xianlei Cao, Seungeock Kim
    Abstract:

    Abstract In this study, new equations are developed for predicting the Initial Stiffness and ultimate moment of flush end-plate connections (FECs). FECs exhibit partially restrained behavior, which affects the distribution of forces and the displacement of a steel frame. Thus, the influences of the nonlinearity of connections on second-order moments are incorporated into structural analysis. FECs bolted to column flanges and welded to beams are investigated. The experimental data of FECs are collected, including Initial Stiffness and ultimate moment. Finite element analyses are used for analyzing the mechanical behavior of FECs and identifying the fracture mechanism of FECs. The finite element model of FECs is developed using ABAQUS software, and it is verified through comparison with the experimental results of previous studies. The mechanical behavior of FECs is investigated. An improved semi-empirical equation for the Initial Stiffness is suggested, and it provides good accuracy. A new type of fracture mechanism for FECs is suggested. An equation for estimating the ultimate moment is derived from the suggested fracture mechanism, and it shows good agreement with experimental data.

  • numerical estimation for Initial Stiffness and ultimate moment of t stub connections
    Journal of Constructional Steel Research, 2018
    Co-Authors: Zhengyi Kong, Seungeock Kim
    Abstract:

    Abstract The work in this paper presents the results of a series of finite-element simulations aiming at the prediction of Initial Stiffness and ultimate moment for T-stub connections. The developed finite element models using ABAQUS software are verified by comparison with previous experimental tests by others. Several parameters, such as the material properties, flange thickness, web thickness, flange length, and web height of T-stub, gage distance, height of column, and depth of beam are considered in the analysis. An improved model for the Initial Stiffness is proposed, and it agrees well with the various test data. The types of collapse mechanisms for T-stub connections are also established. The model of ultimate moment capacity is proposed, and good agreement between the proposed model and the various test data is shown.

  • numerical estimation for Initial Stiffness and ultimate moment of top seat angle connections without web angle
    Journal of Structural Engineering-asce, 2017
    Co-Authors: Zhengyi Kong, Seungeock Kim
    Abstract:

    AbstractThis paper develops new models predicting the Initial Stiffness and ultimate moment of top-seat angle connections without web angle (TSACs). The TSACs, bolted to the beam flange and the col...

  • numerical estimation of the Initial Stiffness and ultimate moment capacity of single web angle connections
    Journal of Constructional Steel Research, 2016
    Co-Authors: Zhengyi Kong, Seungeock Kim
    Abstract:

    Abstract Single-web angle connections bolted to the beam web and the column flange are studied to investigate the effect of the thickness, length, and material properties of the angles, number of bolts, and gage distances of the fasteners on their moment–rotation behavior. ABAQUS software is used to analyze the nonlinear behavior of a single-web angle connection. Identical geometric and material properties with Lipson's test are utilized to verify the finite element models. A simpler and more accurate equation for the Initial Stiffness is suggested, and good agreement between the proposed model and Lipson's test data is demonstrated. The type of collapse mechanisms for single-web connection is established. The ultimate moment capacity modified from Kishi and Chen's equation is also proposed, and it agrees well with Lipson's test data.

Maryam Daei - One of the best experts on this subject based on the ideXlab platform.

  • New Initial Stiffness equation for the bearing component of bolted thin-walled steel plates
    Structures, 2020
    Co-Authors: Marzieh Obeydi, Mehran Zeynalian, Maryam Daei
    Abstract:

    Abstract In this paper, a numerical and analytical study was carried out in order to develop a new Initial Stiffness equation for thin-walled steel plate in bearing component. In this regard, effects of different design variables and curling occurrence on Initial Stiffness of this component were investigated. A set of parametric studies was performed on experimentally validated finite element models restraining curling occurrence to investigate the effect of geometrical parameters on Initial Stiffness of thin-walled steel plates. These design parameters included plate thickness, end distance, and edge distance and number of bolts. Effect of curling occurrence on Initial Stiffness was also considered using an analytical study. Finally, a new Initial Stiffness equation was proposed and compared with Eurocode3 design standard equation of hot-rolled steel plates. This new equation can be used in component-based modeling to calculate Initial Stiffness of thin-walled steel plate in bearing component. The outputs obtained by new equation showed better agreement with validated finite element results than those of old equation.

Zhengyi Kong - One of the best experts on this subject based on the ideXlab platform.

  • new equations for predicting Initial Stiffness and ultimate moment of flush end plate connections
    Journal of Constructional Steel Research, 2020
    Co-Authors: Zhengyi Kong, Shaozheng Hong, Xianlei Cao, Seungeock Kim
    Abstract:

    Abstract In this study, new equations are developed for predicting the Initial Stiffness and ultimate moment of flush end-plate connections (FECs). FECs exhibit partially restrained behavior, which affects the distribution of forces and the displacement of a steel frame. Thus, the influences of the nonlinearity of connections on second-order moments are incorporated into structural analysis. FECs bolted to column flanges and welded to beams are investigated. The experimental data of FECs are collected, including Initial Stiffness and ultimate moment. Finite element analyses are used for analyzing the mechanical behavior of FECs and identifying the fracture mechanism of FECs. The finite element model of FECs is developed using ABAQUS software, and it is verified through comparison with the experimental results of previous studies. The mechanical behavior of FECs is investigated. An improved semi-empirical equation for the Initial Stiffness is suggested, and it provides good accuracy. A new type of fracture mechanism for FECs is suggested. An equation for estimating the ultimate moment is derived from the suggested fracture mechanism, and it shows good agreement with experimental data.

  • numerical estimation for Initial Stiffness and ultimate moment of t stub connections
    Journal of Constructional Steel Research, 2018
    Co-Authors: Zhengyi Kong, Seungeock Kim
    Abstract:

    Abstract The work in this paper presents the results of a series of finite-element simulations aiming at the prediction of Initial Stiffness and ultimate moment for T-stub connections. The developed finite element models using ABAQUS software are verified by comparison with previous experimental tests by others. Several parameters, such as the material properties, flange thickness, web thickness, flange length, and web height of T-stub, gage distance, height of column, and depth of beam are considered in the analysis. An improved model for the Initial Stiffness is proposed, and it agrees well with the various test data. The types of collapse mechanisms for T-stub connections are also established. The model of ultimate moment capacity is proposed, and good agreement between the proposed model and the various test data is shown.

  • numerical estimation for Initial Stiffness and ultimate moment of top seat angle connections without web angle
    Journal of Structural Engineering-asce, 2017
    Co-Authors: Zhengyi Kong, Seungeock Kim
    Abstract:

    AbstractThis paper develops new models predicting the Initial Stiffness and ultimate moment of top-seat angle connections without web angle (TSACs). The TSACs, bolted to the beam flange and the col...

  • numerical estimation of the Initial Stiffness and ultimate moment capacity of single web angle connections
    Journal of Constructional Steel Research, 2016
    Co-Authors: Zhengyi Kong, Seungeock Kim
    Abstract:

    Abstract Single-web angle connections bolted to the beam web and the column flange are studied to investigate the effect of the thickness, length, and material properties of the angles, number of bolts, and gage distances of the fasteners on their moment–rotation behavior. ABAQUS software is used to analyze the nonlinear behavior of a single-web angle connection. Identical geometric and material properties with Lipson's test are utilized to verify the finite element models. A simpler and more accurate equation for the Initial Stiffness is suggested, and good agreement between the proposed model and Lipson's test data is demonstrated. The type of collapse mechanisms for single-web connection is established. The ultimate moment capacity modified from Kishi and Chen's equation is also proposed, and it agrees well with Lipson's test data.

Marzieh Obeydi - One of the best experts on this subject based on the ideXlab platform.

  • New Initial Stiffness equation for the bearing component of bolted thin-walled steel plates
    Structures, 2020
    Co-Authors: Marzieh Obeydi, Mehran Zeynalian, Maryam Daei
    Abstract:

    Abstract In this paper, a numerical and analytical study was carried out in order to develop a new Initial Stiffness equation for thin-walled steel plate in bearing component. In this regard, effects of different design variables and curling occurrence on Initial Stiffness of this component were investigated. A set of parametric studies was performed on experimentally validated finite element models restraining curling occurrence to investigate the effect of geometrical parameters on Initial Stiffness of thin-walled steel plates. These design parameters included plate thickness, end distance, and edge distance and number of bolts. Effect of curling occurrence on Initial Stiffness was also considered using an analytical study. Finally, a new Initial Stiffness equation was proposed and compared with Eurocode3 design standard equation of hot-rolled steel plates. This new equation can be used in component-based modeling to calculate Initial Stiffness of thin-walled steel plate in bearing component. The outputs obtained by new equation showed better agreement with validated finite element results than those of old equation.