Abstract
This paper presents results from experimental studies on the effect of temperature on mechanical properties of high-strength low-alloy ASTM A572 steel commonly used in structural members in bridges. A set of high-temperature tensile strength tests and post-temperature exposed residual strength tests is carried out on ASTM A572 steel coupons in 20–1000 °C temperature range. The residual strength tests on high-temperature exposed steel coupons are carried out after subjecting the coupons to two methods of cooling, namely, air cooling and water quenching. Results from these tests indicate that temperature-dependent strength and stiffness degradation in A572 steel follow the same trend as that of carbon steel but with some variations. A572 steel recovers almost 100% of its room temperature yield strength when heated to temperature up to 600 °C, regardless of the method of cooling, while the extent of strength degradation in coupons subjected to heating beyond 600 °C is dependent on heated temperature and method of cooling. Data generated in these tests are utilized to generate high-temperature stress–strain and residual stress–strain response of A572 steel. These results are also utilized to propose temperature-dependent strength, elastic modules, and residual strength reduction factors of A572 steel, which can be used in evaluating residual response of fire-exposed steel structures.
| Original language | English |
|---|---|
| Pages (from-to) | 926-939 |
| Number of pages | 14 |
| Journal | Fire and Materials |
| Volume | 40 |
| Issue number | 7 |
| DOIs | |
| State | Published - 1 Nov 2016 |
Bibliographical note
Publisher Copyright:Copyright © 2015 John Wiley & Sons, Ltd.
Keywords
- ASTM A572 steel
- high-temperature stress–strain response
- mechanical properties
- residual strength tests