The Influence of Cowper-Symonds Coefficients on the Response of Stiffened Steel Plates Subjected to Close-In Blast Loads

Nurul Syafiqah, Abdul Razak and Aizat, Alias and Nor Maslina, Mohsan and Siti Aliyyah, Masjuki (2022) The Influence of Cowper-Symonds Coefficients on the Response of Stiffened Steel Plates Subjected to Close-In Blast Loads. In: Key Engineering Materials. World Sustainable Construction Conference Series 2021 , 15–16 October 2021 , Kuantan, Pahang, Malaysia. pp. 171-184., 912 (274579). ISSN 1662-9795

Preview	Pdf The Influence of Cowper-Symonds Coefficients on The Response of Stiffened Steel Plates.pdf Download (128kB) | Preview
	Pdf The Influence of Cowper-Symonds Coefficients on The Response of Stiffened Steel Plates Subjected to Close-In Blast Loads.pdf Restricted to Repository staff only Download (592kB) | Request a copy

Abstract

The Cowper-Symonds relationship is the most common empirical equation used to model the influence of strain rates in steel structures subjected to blast loads. The simplicity of this relationship makes it as the preferred choice due to the minimum number of coefficients used in the equation. However, different coefficients were reported from experimental results where it was found that the coefficients could be influenced by the thickness of the specimens, types of materials and method of testing. Even so, the actual coefficients even for the same type of material such as for mild steel could be differ. It is known that strain rates effect increases the yield strength of steel, and this could reduce the maximum displacement of steel structures such as steel plates subjected to blast loads. This influence could be more significant if the steel plate was stiffened. Therefore, this study investigated the influence of Cowper-Symonds coefficients for steel plates with stiffeners subjected to close-in blast loads. The numerical investigations were performed using finite element software, Abaqus. The target plate was a 0.4 m x 0.4 m plate with 0.002 m of thickness subjected to a 0.012 kg of Plastic Explosive No. 4 (PE4) at 0.04 m stand-off distance. The influenced of stiffeners were investigate first where five stiffeners’ configurations were used and, in each configuration, the stiffeners come with different geometry ratios. Two best stiffened steel plates have been chosen to study the influence of different Cowper-Symonds coefficients. Different coefficient values of dominator, D and hardening coefficients, q was used. The results shows that any possible coefficient combinations of Cowper-Symonds relation are possible to use in predicting response of steel plates subjected to blast loads. From this study, the most ideal stiffened square steel plates for offshore platform could be identified.

Item Type:	Conference or Workshop Item (Paper)
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	Abaqus, Blast Load, Cowper-Symonds, Finite Element, Steel Plate
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General)
Faculty/Division:	Institute of Postgraduate Studies Faculty of Civil Engineering Technology
Depositing User:	Miss Amelia Binti Hasan
Date Deposited:	09 Jul 2024 09:11
Last Modified:	09 Jul 2024 09:11
URI:	http://umpir.ump.edu.my/id/eprint/41832
Download Statistic:	View Download Statistics

Actions (login required)

View Item