预制混凝土墙体构件中 T 型和 L 型连接弯环钢丝绳的锚固能力

IF 3 3区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Structural Concrete Pub Date : 2024-08-29 DOI:10.1002/suco.202400107
Torkil Veyhe, Henrik Brøner Jørgensen, Søren Gustenhoff Hansen
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引用次数: 0

摘要

在过去十年中,使用柔性钢丝绳代替传统 U 型杆来连接墙体构件这一方便施工的设计原则得到了普及。然而,在 T 型和 L 型连接中锚固钢丝绳仍然是一项复杂的挑战。在这种情况下,钢丝绳会从墙体构件的侧面伸出,并在锚固区弯曲。本文介绍了使用 40 个试样进行广泛实验的结果,研究了钢丝绳在这些条件下在墙体构件中的锚固能力。研究结果表明,专门设计的加固件可显著提高锚固能力,而传统墙体加固件的影响则微乎其微。失效机理主要涉及混凝土锥体失效,为施工友好型连接提供了宝贵的见解。根据观察到的失效机理,本文提出了一种分析失效机理。该模型基于塑性理论的上界定理。该模型能准确预测承载能力和失效机理。
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Anchorage capacity of bent looped wire ropes in precast concrete wall elements for T‐ and L‐ connections
Within the last decade, a construction‐friendly design principle using flexible wire ropes instead of traditional u‐bars for connecting wall elements has gained popularity. However, anchoring wire ropes in T and L connections remains a complex challenge. Here, the wire ropes stick out of the side of the wall element and are bent in the anchorage zone. This paper presents the findings of an extensive experimental program with 40 specimens, investigating the anchorage capacity of wire ropes in wall elements under these conditions. The study reveals that specially designed reinforcements significantly increase the anchorage capacity, while traditional wall reinforcements have minimal impact. Failure mechanisms primarily involve concrete cone failures, providing valuable insights for construction‐friendly connections. Based on the observed failure mechanism, the paper presents an analytical failure mechanism. The model is based on the upper‐bound theorem of plasticity theory. The model predicts both the capacity and the failure mechanism with satisfactory accuracy.
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来源期刊
Structural Concrete
Structural Concrete CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL
CiteScore
5.60
自引率
15.60%
发文量
284
审稿时长
3 months
期刊介绍: Structural Concrete, the official journal of the fib, provides conceptual and procedural guidance in the field of concrete construction, and features peer-reviewed papers, keynote research and industry news covering all aspects of the design, construction, performance in service and demolition of concrete structures. Main topics: design, construction, performance in service, conservation (assessment, maintenance, strengthening) and demolition of concrete structures research about the behaviour of concrete structures development of design methods fib Model Code sustainability of concrete structures.
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