The Experts below are selected from a list of 108 Experts worldwide ranked by ideXlab platform
Chen Yuping - One of the best experts on this subject based on the ideXlab platform.
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application of stiffness models of classical laminate plate theory in plywood
Journal of Nanjing Forestry University, 2007Co-Authors: Chen YupingAbstract:Based on the structure characteristic of plywood and former predictions of in-plane modulus of poplar veneer,the stiffness models of classical laminate plate theory were applied to plywood.In the models test,two plies impregnated paper were orthotropicly overlaided on the face and back poplar veneer.When the test specimens were under single axial tensile Load or pure Bending Moment Load,the strain of face and back plies,ex and ey was obtained through strain gage.The experimental and theoretic value of some compliance coefficients were tested.The results showed that the stiffness models could predict the stiffness of plywood well,and the stiffness models of classical laminate plate theory could be used to describe the stiffness of plywood.
Yongchang Wang - One of the best experts on this subject based on the ideXlab platform.
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Behaviour and design of restrained steel column in fire: Part 2. Parameter study
Journal of Constructional Steel Research, 2010Co-Authors: Peijun Wang, Yongchang WangAbstract:Abstract This paper investigates behaviours of the restrained steel column in fire. For the restrained steel column under axial Load only, investigated parameters include the axial Load, the axial restraint stiffness, and the column slenderness; for the restrained steel column under combined axial Load and Bending Moment, studied parameters included the axial Load, the Bending Moment Load, the axial restraint stiffness, the column slenderness and the end Moment ratio. The results of parametric studies show that (1) the axial restraint causes a reduction in the failure temperature of the restrained column. The reduction increases with the increase in the axial restraint stiffness. However, when the axial restraint stiffness ratio is greater than a certain value, no further reduction occurs; (2) the difference between failure and buckling temperatures of a restrained column is great for columns with great axial restraint stiffness or great slenderness or small Load ratio. This means that in this situation, the fire resistance of the restrained column can be increased from the column buckling temperature by considering the post-buckling behaviour; (3) an increase in the column axial Load ratio or Bending Moment ratio causes both the column buckling and failure temperatures to decrease; (4) with an increase in the column end Moment ratio, the failure temperature of restrained column decreases. The results of parametric studies will form the basis of a simplified calculation method to be presented in the companion paper.
Wang Yong-chang - One of the best experts on this subject based on the ideXlab platform.
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Behaviors of Restrained Steel Column in Fire Under Combined Axial Force and Bending Moment
Journal of Tongji University, 2010Co-Authors: Wang Yong-changAbstract:This paper investigates behaviors of the restrained column under combined axial force and Bending Moment in fire using a calibrated finite element method model.Presented results include the column axial force-temperature evolution curve,the column Bending Moment-temperature evolution curve,the failure temperature of restrained column,the difference between failure temperature of unrestrained-and restrained-column,and the difference between failure-and buckling-temperature of restrained column.Results of parametric study show that:before the column buckles,the axial force in column increases linearly and Bending Moment changes a little;after the column buckles,the column is Loaded under combined axial force and Bending Moment;the axial restraint reduces failure temperature of restrained column;and the reduction in failure temperature increases with increasing in axial restraint stiffness.However,there is a critical axial restraint stiffness ratio,above which no further reduction in column failure temperature occurs;with the increasing of axial Load ratio and Bending Moment Load ratio,the failure temperature of restrained column decreases;the end Moment ratio has very limited effects on failure temperature of the restrained column.
Peijun Wang - One of the best experts on this subject based on the ideXlab platform.
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Behaviour and design of restrained steel column in fire: Part 2. Parameter study
Journal of Constructional Steel Research, 2010Co-Authors: Peijun Wang, Yongchang WangAbstract:Abstract This paper investigates behaviours of the restrained steel column in fire. For the restrained steel column under axial Load only, investigated parameters include the axial Load, the axial restraint stiffness, and the column slenderness; for the restrained steel column under combined axial Load and Bending Moment, studied parameters included the axial Load, the Bending Moment Load, the axial restraint stiffness, the column slenderness and the end Moment ratio. The results of parametric studies show that (1) the axial restraint causes a reduction in the failure temperature of the restrained column. The reduction increases with the increase in the axial restraint stiffness. However, when the axial restraint stiffness ratio is greater than a certain value, no further reduction occurs; (2) the difference between failure and buckling temperatures of a restrained column is great for columns with great axial restraint stiffness or great slenderness or small Load ratio. This means that in this situation, the fire resistance of the restrained column can be increased from the column buckling temperature by considering the post-buckling behaviour; (3) an increase in the column axial Load ratio or Bending Moment ratio causes both the column buckling and failure temperatures to decrease; (4) with an increase in the column end Moment ratio, the failure temperature of restrained column decreases. The results of parametric studies will form the basis of a simplified calculation method to be presented in the companion paper.
He Xiong-jun - One of the best experts on this subject based on the ideXlab platform.
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Study of Force Transmitting Behavior of Joint Section of a Three-Span Steel and Concrete Continuous Hybrid Girder Bridge
Bridge Construction, 2012Co-Authors: He Xiong-junAbstract:The main bridge of the Changqiao Bridge on the National Road G318 is a three-span steel and concrete continuous hybrid girder shipping channel bridge.The design of the steel and concrete joint section of the bridge is that a steel joint is embedded on one side of the prestressed concrete box girder and is then welded with the other side of the steel box girder.To study the force transmitting behavior of the joint section,the software MIDAS FEA was used to set up the finite element model for the section and the stress in the webs of the steel box girder at the joint surface,in the concrete and bottom and top of the embedded steel plates of the joint part and in the steel joint was analyzed.The results of the analysis reveal that the webs of the girder are in good working conditions and the force transmitting behavior of the join part is satisfactory.The force transmitting mechanism of the joint part is that as the Bending Moment Load is transmitted to the steel padding plate,the Load is mainly shared by the upper and lower flanges of the embedded steel joint,the Load is in turn transmitted to the concrete via the steel plates and the action of the force transmitting of the PBL perforated plates in the steel joint and of the steel diaphragm is not obvious.
