Study of the mechanical performance of Grade 1860 steel wires at elevated temperatures

Abstract

The mechanical performance of pre-stressed steel wires at elevated temperatures is a key and fundamental topic for the study of pre-stressed steels in terms of fire resistance and evaluation of post-fire structural damages. In this article, tension tests of grade 1860 Ф^P5 high-strength steel wires at elevated temperatures and post-treatment tension tests of high-strength steel wires were reported. The results revealed that the stress–strain curves of the high-strength steel wire samples at elevated temperature were relatively smooth, while the mechanical performance degraded as the temperature increased. Meanwhile, the mechanical performance of post-treatment sample showed insignificant variation at temperatures lower than 300°C but significantly degradation at temperatures higher than 300°C. This study serves as an essential reference to future studies of pre-stressed steels.

Keywords:

• Pre-stressed steel cables
• Elevated temperatures
• Mechanical performance
• Steel wires
• Post-treatment