Numerical Analysis for Geometry Nonlinear Characters of Laminated Box Beam Columns

2013 ◽  
Vol 477-478 ◽  
pp. 718-722
Author(s):  
Ya Ping Wu ◽  
Jia Wei Zhang ◽  
Yu Ru Zhao ◽  
Yin Hui Wang
Keyword(s):  
Axial Compression ◽  
Beam Deflection ◽  
Width Ratio ◽  
Beam Columns ◽  
Simply Supported ◽  
Axial Compression Ratio ◽  
Box Beam ◽  
Bending Load ◽  
Thin Walled ◽  
Span Width

In the action of bending load and axial compression, the deflection of the beam presents character of geometry nonlinear. For the thin-walled carbon fiber laminated box beam column, the beam deflections not only relate with load but also with the ply angle of layer, span width ratio. By using the method of numerical, this paper analyzed and summarized the beam deflection variation with the span width ratio, ply angle, the axial compression ratio for the simply supported laminated box beam column under the axial compression and bending load.

Experimental Investigations for Compression-Flexure Characters of Laminated Box Beam Columns

2014 ◽  
Vol 933 ◽  
pp. 300-303
Author(s):  
Ya Ping Wu ◽  
Yu Ru Zhao ◽  
Jia Wei Zhang ◽  
Yin Hui Wang
Keyword(s):  
Axial Compression ◽  
Beam Deflection ◽  
Experimental Investigations ◽  
Width Ratio ◽  
Beam Columns ◽  
Axial Compression Ratio ◽  
Box Beam ◽  
Bending Load ◽  
Thin Walled ◽  
Span Width

In the action of bending load and axial compression, the deflection of the beam presents character of compression-flexure. For the thin-walled carbon fiber laminated box beam column, the beam deflections not only relate with load but also with the ply angle of layer, span width ratio. By using the experimental method, this paper this paper focuses on the experimental investigations of the compression-flexure characters of the laminated box beam column, in which the features of beam deflection variation with the span width ratio, ply angle, the axial compression ratio are given.

Effect of Pressurization on the Buckling Behavior of Thin-Walled Cylinders Under Bending Load

2009 ◽  
Author(s):  
Ali Limam ◽  
Ce´dric Mathon
Keyword(s):  
Experimental Investigation ◽  
Internal Pressure ◽  
Axial Compression ◽  
Load Capacity ◽  
Combined Loads ◽  
Plasticity Effect ◽  
Buckling Behavior ◽  
Bending Load ◽  
Thin Walled ◽  
High Internal Pressure

This study deals with the buckling of thin cylindrical shells submitted to combined loads such internal pressure, bending and axial compression. A large experimental investigation is conducted and some explanations on the behavior of such loaded structures and on the influence of distinct parameters are gauged. The parametrical studies show the stabilising effect of low internal pressure and a drop of the load capacity for high internal pressure due to the plasticity effect. Specific recommendations are finally established for the design.

Shear Lag in Thin-Walled Box Girder with Variable Section

2011 ◽  
Vol 194-196 ◽  
pp. 1165-1169
Author(s):  
Yu Hong Zhang ◽  
Zi Jiang Yang ◽  
Shi Zhong Liu
Keyword(s):  
Significant Influence ◽  
Width Ratio ◽  
Stiffness Ratio ◽  
Shear Lag ◽  
Box Girders ◽  
Box Girder ◽  
Lag Effects ◽  
Variable Section ◽  
Thin Walled ◽  
Span Width

In this paper, a equivalent-section method of analyzing shear lag effects in box girders is presented. The effect of two major parameters on shear lag is investigated for cantilever and continuous box girders with variable section under two kinds of loads. It is shown that the span-width ratio, in addition to the flange stiffness to total stiffness ratio, has a significant influence on the shear lag. Finally, conclusions are drawn with regard to further study and research.

Research on Hysteretic Behavior of the Concrete Filled Square CFRP-Steel Tubular (S-CFRP-CFST) Beam-Columns (II): Experimental Results and Analysis

2010 ◽  
Vol 163-167 ◽  
pp. 3575-3579
Author(s):  
Yuan Che ◽  
Qing Li Wang ◽  
Yong Bo Shao ◽  
Xu Zhang
Keyword(s):  
Axial Compression ◽  
Compression Ratio ◽  
Steel Tube ◽  
Experimental Results ◽  
Hysteretic Behavior ◽  
Transverse Strain ◽  
Beam Columns ◽  
Axial Compression Ratio ◽  
Opposite Action ◽  
Seismic Behaviors

Based on analysis of the hysteretic experimental results of the concrete filled square CFRP-steel tubular (S-CFRP-CFST) beam-columns, it shows that the steel tube and the CFRP material can work concurrently both in longitudinal and transverse directions, the longitudinal strain and the transverse strain at a same point have opposite action. Additionally, the deflection curves of all the specimens are close to half sinusoidal shape. Analysis indicates that there is some strength degradation. The axial compression ratio and strengthening factor of the longitudinal CFRP can enhance the strength and the stiffness of the members and they can also delay the stiffness degradation. However, they will decrease the accumulated energy dissipation of the members. The axial compression ratio is beneficial to seismic behaviors to some extent.

Seismic Behavior Analysis on Reinforced Concrete Core Walls Based on Fiber Model

2010 ◽  
Vol 163-167 ◽  
pp. 1068-1073 ◽  
Author(s):  
Wei Hou ◽  
Qing Xuan Shi ◽  
Zhi Lin Ma
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Compression Ratio ◽  
Nonlinear Behavior ◽  
Width Ratio ◽  
Inelastic Behavior ◽  
Concrete Core ◽  
Fiber Model ◽  
Axial Compression Ratio

Reinforced concrete core walls with good anti-side rigidity and spatial rigidity is used widely in high-rise buildings. Elasto-plastic static analysis of core walls are be realized by the program CANNY based on the theory of fiber model. Compared with the tests, Results from the simulation anlysis match well with those from the tests. The influence of axial compression ratio and height-width ratio on the bearing capacity and deformation of core walls are analyzed systemically. It is shown that the fiber model is available and successful for the numerical simulation of core walls. The axial compression ratio has distinct affect on the elastic and inelastic behavior of RC core walls. The ratio of height to width not only has effect on the bearing capacity and deformation performance, but also changes the failure mode of RC core walls. The numerical results confirmed the accuracy of this analysis procedure in representing the nonlinear behavior of core walls.

scholarly journals Hysteretic performance research on high strength circular concrete-filled thin-walled steel tubular columns

2018 ◽  
Author(s):  
Jiantao Wang ◽  
Qing Sun
Keyword(s):  
Axial Compression ◽  
Compression Ratio ◽  
Failure Modes ◽  
High Strength ◽  
Dissipated Energy ◽  
Ultimate Limit State ◽  
Tubular Columns ◽  
Axial Compression Ratio ◽  
Hysteretic Performance ◽  
Thin Walled

Under violent earthquake motions, the severe damage in critical regions of structures could be ascribed to cumulative damage caused by cyclic loading. Using the high strength (HS) materials in concrete-filled steel tubular (CFST) columns is the effective way and popular tendency to promote the seismic behavior in anti-seismic design. In this paper, an experimental study on the hysteretic performance of high strength circular concrete-filled thin-walled steel tubular columns (HCFTST) columns was carried out. A total of six specimens were tested under constant axial compression combining cyclic lateral loading. The tested parameters were the different combinations of diameter-to-thickness (D/t) ratio, axial compression ratio (n) and concrete cylinder compressive strength (fc).The failure modes, load-displacement hysteretic curves, skeleton curves, dissipated energy and stiffness degradation were examined in detail. Through the experiment analysis result, it indicates that the ultimate limit state is reached as the severe local buckling and rupture of the steel tubes accompanying the core concrete crushing occur. Using high strength materials could have a larger elastic deformation capacity and the higher axial compression ratio within test scopes could motivate the potential of HS materials. In brief, the HCFTST columns with ultra-large D/t ratios under reasonable design could perform excellent hysteretic performance, which can be applied in earthquake-prone regions widely.

scholarly journals An experimental study on strength of thin-walled steel box beam-columns under repetitive bending.

1988 ◽  
pp. 43-51 ◽  
Author(s):  
Eiichi WATANABE ◽  
Susumu EMI ◽  
Hidenori ISAMI ◽  
Tohru YAMANOUCHI
Keyword(s):  
Experimental Study ◽  
Beam Columns ◽  
Box Beam ◽  
Thin Walled

Finite Element Analysis on the Vibration Mode of Composite Thin-Walled Box Beam with Double-Cell Sections

2012 ◽  
Vol 569 ◽  
pp. 495-499
Author(s):  
Shuang Shuang Sun ◽  
Fang Wu Jia ◽  
Yong Sheng Ren
Keyword(s):  
Finite Element ◽  
Width Ratio ◽  
Finite Element Models ◽  
Modal Shape ◽  
Element Analysis ◽  
Finite Element Software ◽  
Box Beam ◽  
Box Beams ◽  
Length Width ◽  
Thin Walled

The modal analysis of composite thin-walled box beams with double-cell sections is carried out by the finite element software ANSYS. The finite element models are established first for the double-cell composite thin-walled box beams, then the vibration modes of two box beams: Circumferentially Uniform Stiffness (CUS) and Circumferentially Antisymmetric Stiffness (CAS) are calculated and analyzed. The effects of length-width ratio and width-height ratio on the natural frequency and the modal shape of the double-cell composite thin-walled box beams are discussed.

Nonlinear Model of Thin-Walled Composite Beams with Moderate Deflections

2010 ◽  
Vol 29-32 ◽  
pp. 22-27 ◽  
Author(s):  
Yong Sheng Ren ◽  
Xiang Hong Du
Keyword(s):  
Nonlinear Model ◽  
Composite Beams ◽  
Beam Deflection ◽  
Geometrically Nonlinear ◽  
Algebraic Equations ◽  
Analysis Model ◽  
Geometrically Nonlinear Analysis ◽  
Box Beam ◽  
Nonlinear Algebraic Equations ◽  
Thin Walled

A geometrically nonlinear model for thin-walled, single-cell composite beams is developed by using variational formulation and the variational-asympotical method. The structural modeling is split into two parts: a two-dimensional analysis over the cross section, and a geometrically nonlinear analysis of a beam along the beam span. The nonlinear model is based on the assumption of moderate beam deflection, accounting for the pitch angle and extends the linear analysis model for anisotropic thin-walled beams. By employing the Galerkin’s method, an nonlinear algebraic equations is derived and then solved by means of an incremental Newton-Raphson method. Numerical results are obtained for one cantilevered box beam: Circumferentially Uniform Stiffness(CUS), under external load to investigate the effect of geometric nonlinearity and the effects of the fiber orientation, laminate stacking sequence, are also addressed.

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