Experimental study on tubular K-joints under impact loadings

Abstract This paper experimentally examines the behaviour of tubular K-joints subjected to impact loadings. An experimental programme involved two tests on unstiffened tubular K-joints under different impact energies and one on stiffened configuration is carried out through a high-performance drop hammer machine. The dynamic responses of three tubular K-joints are described and discussed with emphasis on the effect of impact energy and internal stiffeners. Based on the experimental results, the key behavioural patterns including the development of impact force, deformation and strain, as well as failure modes are identified, and impact mechanism is also investigated. It is shown that the local indentation at the impacted area of the chord is the main plastic deformation of tubular K-joints under impact, and higher applied impact energy results in larger plasticity. Moreover, the presence of internal ring stiffeners significantly improves the impact resistance of tubular K-joints.

[1]  Norman Jones,et al.  Low-velocity impact of pressurised pipelines , 2010 .

[2]  J. E. Harding,et al.  Dynamic behaviour of axially pre-loaded tubular steel members of offshore structures subjected to impact damage , 1999 .

[3]  B. Uy,et al.  Response of Foam- and Concrete-Filled Square Steel Tubes under Low-Velocity Impact Loading , 2011 .

[4]  L. Javier Malvar,et al.  Review of Strain Rate Effects for Concrete in Tension , 1998 .

[5]  Carlos Guedes Soares,et al.  Plastic Analysis of Laterally Loaded Circular Tubes , 1983 .

[6]  B. Uy,et al.  Impact behaviour of pre-compressed hollow and concrete filled mild and stainless steel columns , 2014 .

[7]  Daxu Zhang,et al.  Experimental study on mechanical behavior of an impacted steel tubular T-joint in fire , 2011 .

[8]  J. E. Harding,et al.  Axially pre-loaded steel tubes subjected to lateral impacts : An experimental study , 2002 .

[9]  J. E. Harding,et al.  Axially pre-loaded steel tubes subjected to lateral impacts (a numerical simulation) , 2008 .

[10]  W. Q. Shen,et al.  Further experimental study on the failure of fully clamped steel pipes , 1998 .

[11]  J. E. Harding,et al.  Contribution of ring resistance in the behaviour of steel tubes subjected to a lateral impact , 2000 .

[12]  Norman Jones,et al.  Dynamic energy absorption and perforation of ductile structures , 2010 .

[13]  Jian Song,et al.  Evaluation of damage to offshore platform structures due to collision of large barge , 2005 .

[14]  Yan Xiao,et al.  Flexural Behavior of Concrete-Filled Circular Steel Tubes under High-Strain Rate Impact Loading , 2012 .

[15]  Shao Yong-bo,et al.  Mechanism Analysis of Impact Performance For Tubular T-Joint , 2010 .

[16]  Raphael H. Grzebieta,et al.  Hollow and concrete filled steel hollow sections under transverse impact loads , 2008 .

[17]  J. E. Harding,et al.  Interface Forces in Laterally Impacted Steel Tubes , 2008 .

[18]  Wang Zili,et al.  Study on Collision Behavior of K-joint in Offshore Jacket Platform , 2007 .

[19]  Qu Hui.  Impact performance studies of T-tubular joint impacted on the chord , 2011 .

[20]  J. E. Harding,et al.  Effect of impact damage on the capacity of tubular steel members of offshore structures , 1998 .

[21]  Lin-Hai Han,et al.  Behavior of concrete filled steel tubular (CFST) members under lateral impact: Experiment and FEA model , 2013 .

[22]  Chao Xu,et al.  Numerical Studies on Dynamic Behaviour of Tubular T-joint Subjected to Impact Loading , 2018 .