玻璃钢夹套对受限超高性能混凝土压缩性能的集中约束效应

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-03-07 DOI:10.1016/j.conbuildmat.2025.140583

Yao Lu , Wanye Li , Peng Wang , Weiwen Li , Feng Xing

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引用次数: 0

摘要

基于约束型超高性能混凝土（UHPC）内部裂缝演化与外部纤维增强聚合物（FRP）护套之间的相互作用，提出了集中约束效应这一创新概念，以解释FRP护套约束型超高性能混凝土轴向压缩应力-应变响应中第一上升分支的出现。为验证集中约束效应的合理性，系统研究了玻璃钢夹套约束UHPC的裂纹演化、扩展特征和压缩性能的应力-应变响应。建立了不同约束刚度条件下FRP护套约束UHPC第一上升支抗压强度预测模型。强调了一升支对玻璃钢夹套约束的超高性能混凝土抗压性能的实际工程意义：极限强度提供了安全裕度，而一升支强度更适合结构工程的设计要求。

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Concentrated confinement effect of FRP jacket on compressive behavior of confined UHPC

Drawing upon the interplay between crack evolution within the confined ultra-high-performance concrete (UHPC) and external fiber reinforced polymer (FRP) jackets, an innovative concept dubbed the concentrated confinement effect is put forward to illuminate the occurrence of the first ascending branch in the axial compressive stress-strain response of FRP jacket-confined UHPC. Further, the crack evolution, dilation characteristics and stress-strain response of compressive behavior of FRP jacket-confined UHPC are systematically investigated to verify the rationality of concentrated confinement effect. Also, a model is established to predict the compressive strength of the first ascending branch of FRP jacket-confined UHPC with varying confinement stiffness. The practical engineering significance of the first ascending branch to the compressive properties of FRP jacket-confined UHPC is emphasized: the ultimate strength offers a safety margin, while the first ascending branch strength is more appropriate for the design requirements of structural engineering.

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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.