A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Material properties of cold-formed high strength steel at elevated temperatures
AbstractThis paper presents the material properties of cold-formed high strength steel at elevated temperatures. Material properties at elevated temperatures have a crucial role in fire resistance design of steel structures. The fire resistances of steel structures in the existing international standards are mainly based on experimental data of hot-rolled mild steel. However, investigation of high strength steel at elevated temperatures is limited. Therefore, a test program has been carried out to investigate the material properties of cold-formed high strength steel at elevated temperatures. The coupon specimens were extracted from cold-formed high strength steel square and rectangular hollow sections with nominal yield stresses of 700 and 900MPa at ambient temperature. The coupon tests were carried out through both steady and transient state test methods for temperatures up to 1000°C. Material properties including thermal elongation, elastic modulus, yield stress, ultimate strength, ultimate strain and fracture strain were obtained from the tests. The test results were compared with the design values in the European, American, Australian and British standards. The comparison results revealed the necessity of proposing specified design rules for material properties of cold-formed high strength steel at elevated temperatures. New design curves to determine the deterioration of material properties of cold-formed high strength steel at elevated temperatures are proposed. It is shown that the proposed design curves are suitable for high strength steel materials with nominal yield stresses ranged from 690 to 960MPa at ambient temperature.
HighlightsA total of 83 tensile coupon tests of cold-formed high strength steel was conducted.The specimen temperature ranged from ambient temperature to 1000°C.Both steady and transient state test methods were used for the coupon tests.Existing design rules for material properties at elevated temperatures are assessed.New design curves for material properties at elevated temperatures are proposed.
Material properties of cold-formed high strength steel at elevated temperatures
AbstractThis paper presents the material properties of cold-formed high strength steel at elevated temperatures. Material properties at elevated temperatures have a crucial role in fire resistance design of steel structures. The fire resistances of steel structures in the existing international standards are mainly based on experimental data of hot-rolled mild steel. However, investigation of high strength steel at elevated temperatures is limited. Therefore, a test program has been carried out to investigate the material properties of cold-formed high strength steel at elevated temperatures. The coupon specimens were extracted from cold-formed high strength steel square and rectangular hollow sections with nominal yield stresses of 700 and 900MPa at ambient temperature. The coupon tests were carried out through both steady and transient state test methods for temperatures up to 1000°C. Material properties including thermal elongation, elastic modulus, yield stress, ultimate strength, ultimate strain and fracture strain were obtained from the tests. The test results were compared with the design values in the European, American, Australian and British standards. The comparison results revealed the necessity of proposing specified design rules for material properties of cold-formed high strength steel at elevated temperatures. New design curves to determine the deterioration of material properties of cold-formed high strength steel at elevated temperatures are proposed. It is shown that the proposed design curves are suitable for high strength steel materials with nominal yield stresses ranged from 690 to 960MPa at ambient temperature.
HighlightsA total of 83 tensile coupon tests of cold-formed high strength steel was conducted.The specimen temperature ranged from ambient temperature to 1000°C.Both steady and transient state test methods were used for the coupon tests.Existing design rules for material properties at elevated temperatures are assessed.New design curves for material properties at elevated temperatures are proposed.
Material properties of cold-formed high strength steel at elevated temperatures
Li, Hai-Ting (author) / Young, Ben (author)
Thin-Walled Structures ; 115 ; 289-299
2017-02-17
11 pages
Article (Journal)
Electronic Resource
English
Mechanical Properties of Cold-Formed Steel at Elevated Temperatures
| British Library Conference Proceedings | 2004
Experimental investigation of cold-formed steel material at elevated temperatures
| Online Contents | 2007