FEM and Experimental Study on Mechanical Property of Container Building with Holes

Yang Zuo,Xiaoxiong Zha 한국강구조학회 2017 International Journal of Steel Structures Vol.17 No.1

Based on the finite element simulation and the experimental verification, the stiffness of container building with holes is studied. Firstly, through finite element software of the Abaqus, 20ft and 40ft container model are established, and the corresponding holes and stiffening members are considered. Through simulation, the stiffness and Mises stress contour of the container model are got. Secondly, a full size experiment of container with holes is studied, and then, through comparison of the loading-displacement curves and the loading-stress curves with finite element simulation, the finite element model is verified. Finally, based on the verified finite element model, the influence laws of the hole and the stiffening member is given, and the relevant design recommendations of the hole position, the hole area, the hole size ratio and the stiffening member form are given. Research results make feasible in design and construction of the container buildings and provide some references to the corresponding specification preparation.

An incompatible 3D solid element for structural analysis at elevated temperatures

Yu, Xinmeng,Zha, Xiaoxiong,Huang, Zhaohui Techno-Press 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.40 No.3

The eight-node 3D solid element is one of the most extensively used elements in computational mechanics. This is due to its simple shape and easy of discretization. However, due to the parasitic shear locking, it should not be used to simulate the behaviour of structural members in bending dominant conditions. Previous researches have indicated that the introduction of incompatible mode into the displacement field of the solid element could significantly reduce the shear locking phenomenon. In this study, an incompatible mode eight-node solid element, which considers both geometric and material nonlinearities, is developed for modelling of structural members at elevated temperatures. An algorithm is developed to extend the state determination procedure at ambient temperature to elevated temperatures overcoming initially converged stress locking when the external load is kept constant. Numerical studies show that this incompatible element is superior in terms of convergence, mesh insensitivity and reducing shear locking. It is also showed that the solid element model developed in this paper can be used to model structural behaviour at both ambient and elevated temperatures.

FEM and Experimental Study on Mechanical Property of Integrated Container Building

Yang Zuo,Xiaoxiong Zha 한국강구조학회 2018 International Journal of Steel Structures Vol.18 No.2

Recently, a growing number of the containers have been used in the building structures, therefore, the full size container stiff ness have been studied under the longitudinal load, including the 20 ft container, 40 ft container and the 20 ft combined container. Firstly, the full size container experiment has been studied, and then, the load–displacement curve and loadstress curve have been got. Secondly, based on the nonlinear fi nite element software of Abaqus, the container model has been established and analyzed. By comparing with the load–displacement curves and load-stress values of experiment, the fi nite element model has been verifi ed. Finally, based on the verifi ed fi nite element model, the parametric analysis of the corrugated sheeting size, corrugated sheeting cross section, elasticity modulus of top side beam, and every sheeting action for container stiff ness has been given, and the design advice of single and combined container has been given. The research results have made feasible in design and construction of container buildings and provided some references to corresponding specifi cation preparation.

Fire Resistance Performance of FRP Rebar Reinforced Concrete Columns

Hui Wang,Xiaoxiong Zha,Jianqiao Ye 한국콘크리트학회 2009 International Journal of Concrete Structures and M Vol.3 No.2

Concrete columns reinforced with Fibre Reinforced Polymer (FRP) rebar have been increasingly used in civil engineering applications, while the research on fire resistance of such structural members is still very limited. In this paper, attempts are made to predict temperature distribution and mechanical performance of FRP rebar reinforced concrete columns in fire. The effect of concrete cover and section size on fire resistance time is studied by the finite element method. Based on a parametric study, a simple empirical formula to predict fire resistance time is proposed for possible adoption in fire resistance design.

Fire Resistance Performance of FRP Rebar Reinforced Concrete Columns

Wang, Hui,Zha, Xiaoxiong,Ye, Jianqiao Korea Concrete Institute 2009 International Journal of Concrete Structures and M Vol.3 No.2

Concrete columns reinforced with Fibre Reinforced Polymer (FRP) rebar have been increasingly used in civil engineering applications, while the research on fire resistance of such structural members is still very limited. In this paper, attempts are made to predict temperature distribution and mechanical performance of FRP rebar reinforced concrete columns in fire. The effect of concrete cover and section size on fire resistance time is studied by the finite element method. Based on a parametric study, a simple empirical formula to predict fire resistance time is proposed for possible adoption in fire resistance design.

An incompatible 3D solid element for structural analysis at elevated temperatures

Xinmeng Yu,Xiaoxiong Zha,Zhaohui Huang 국제구조공학회 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.40 No.3

The eight-node 3D solid element is one of the most extensively used elements in computational mechanics. This is due to its simple shape and easy of discretization. However, due to the parasitic shear locking, it should not be used to simulate the behaviour of structural members in bending dominant conditions. Previous researches have indicated that the introduction of incompatible mode into the displacement field of the solid element could significantly reduce the shear locking phenomenon. In this study, an incompatible mode eight-node solid element, which considers both geometric and material nonlinearities, is developed for modelling of structural members at elevated temperatures. An algorithm is developed to extend the state determination procedure at ambient temperature to elevated temperatures overcoming initially converged stress locking when the external load is kept constant. Numerical studies show that this incompatible element is superior in terms of convergence, mesh insensitivity and reducing shear locking. It is also showed that the solid element model developed in this paper can be used to model structural behaviour at both ambient and elevated temperatures.

Nonlinear analysis and design of concrete-filled dual steel tubular columns under axial loading

Cheng-Yong Wan,Xiaoxiong Zha 국제구조공학회 2016 Steel and Composite Structures, An International J Vol.20 No.3

A new unified design formula for calculating the composite compressive strength of the axially loaded circular concrete filled double steel tubular (CFDST) short and slender columns is presented in this paper. The formula is obtained from the analytic solution by using the limit equilibrium theory, the cylinder theory and the &$34;Unified theory" under axial compression. Furthermore, the stability factor of CFDST slender columns is derived on the basis of the Perry-Robertson formula. This paper also reports the results of experiments and finite element analysis carried out on concrete filled double steel tubular columns, where the tested specimens include short and slender columns with different steel ratio and yield strength of inner tube; a new constitutive model for the concrete confined by both the outer and inner steel tube is proposed and incorporated in the finite element model developed. The comparisons among the finite element results, experimental results, and theoretical predictions show a good agreement in predicting the behavior and strength of the concrete filled steel tubular (CFST) columns with or without inner steel tubes. An important characteristic of the new formulas is that they provide a unified formulation for both the plain CFST and CFDST columns relating to the compressive strength or the stability bearing capacity and a set of design parameters.