Post-fire mechanical properties of ER110S-G welding material

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-03-27 DOI:10.1016/j.conbuildmat.2025.141007

Wenyu Cai , Guo-Qiang Li

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引用次数: 0

Abstract

The post-fire mechanical properties of welding materials affect the integrity and safety of steel welded connections after a fire event. This paper presents the study results of post-fire mechanical properties of welding material made with ER110S-G electrodes which matches the strength of Q690 high-strength steel. The exposure temperature studied in this research ranges from 200 to 1000 ℃, and the cooling method considered is natural cooling. Tension tests are conducted on smooth round specimens before and after fire to obtain engineering stress-strain curves and mechanical properties. Based on experimental and numerical analysis results, a post-fire true stress-strain model of ER110S-G welding material is derived. Tension tests are also conducted on notched and grooved specimens to obtain the fracture behavior of the welding material under different stress states after fire. Research suggests that the mechanical properties of ER110S-G welding material after fire are quite different from those of Q690 steel. Especially under higher exposure temperatures (> 600℃), there is a significant reduction in the ductility of the welding material. This may lead to a significant deterioration in the deformation capacity of welded connections after a fire, which requires careful evaluation.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.