Behaviour and design of perforated high-strength steel circular hollow section members under pure torsion

Soibam M. Devi , Sanasam V. Devi , Tekcham G. Singh

Abstract

This paper presents a comprehensive finite element (FE) study on the behaviour of high-strength steel (HSS) circular hollow section (CHS) members with a circular perforation subjected to pure torsion. Validated FE models, against existing test data, were developed and utilised in a broad parametric study considering different material grades (S700, S900, and S1100), perforation sizes varying from 30% to 70% of the section diameter, and cross-section slenderness ratios ranging from 2.5 to 400. The results show that torsional capacity decreases significantly with increasing perforation size, with slender sections experiencing greater reductions than non-slender sections across all grades. Existing design provisions were found to be inadequate for perforated HSS CHS members under torsion. To overcome this limitation, modified design equations were proposed by extending current European and American code formulations, along with the Direct strength method and the Continuous strength method, incorporating reduction factors. The proposed equations yield more accurate and reliable predictions, thereby offering improved guidance for the safe and efficient design of perforated HSS CHS members.

Key Words

ircular hollow section; continuous strength method; direct strength method; finite element modelling; high strength steel; perforation; torsional behaviour

Address

Soibam M. Devi — Department of Civil and Infrastructure Engineering, Indian Institute of Technology Jodhpur, India - 342030
Sanasam V. Devi — Department of Civil Engineering, National Institute of Technology Mizoram, India – 796012
Tekcham G. Singh — Department of Civil and Infrastructure Engineering, Indian Institute of Technology Jodhpur, India - 342030

PDF Viewer

Preview is limited to the first 3 pages. Sign in to access the full PDF.

← Back to Volume 57, No. 6