Experimental test on precast concrete reinforcement connector technology based on strong lapping concept

IF 1.8 3区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Structural Design of Tall and Special Buildings Pub Date : 2022-08-11 DOI:10.1002/tal.1980

Xinlei Yang, Y. Lu, Hu Zhao

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引用次数: 0

Abstract

Nowadays, the grouted splice sleeve and grouting‐anchoring overlap‐joint of steel bars are widely used as a connection method between precast concrete elements. However, the further development of these connection methods in the engineering is limited because of the high construction cost and complex construction technology in China. Hence, a precast concrete reinforcement connector, that is, double‐pipe connector (D‐P connector) based on strong lapping concept, was proposed, and the feasibility of the D‐P connector was validated by tensile tests, and the failure pattern and mechanical properties of the specimens were observed. Then, the wall panel specimens that connectors were surrounded by concrete were tested to prove the constraint effect of surrounding concrete on the connecting members. Finally, the influences of the parameters, including grout strength, grout height, and connector length, on the failure pattern and mechanical properties of the specimens were investigated. The results show that the influence of the parameters on the performance of the specimens is insignificant, demonstrating that the infill material was mainly used to fix the relative positions of the bar and the D‐P connector. To save cost effectively, high‐strength grout could be replaced by common cement slurry, and the length of D‐P connector could be properly reduced.

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基于强搭接概念的预制混凝土钢筋连接件技术试验研究

如今，钢筋的灌浆拼接套管和灌浆锚固搭接接头被广泛用作预制混凝土构件之间的连接方法。然而，由于中国的施工成本高，施工技术复杂，这些连接方法在工程中的进一步发展受到限制。因此，提出了一种基于强搭接概念的预制混凝土钢筋连接件，即双管连接件（D‐P连接件），并通过拉伸试验验证了D‐P连接器的可行性，并观察了试件的破坏模式和力学性能。然后，对连接件周围为混凝土的墙板试件进行了试验，验证了周围混凝土对连接件的约束作用。最后，研究了灌浆强度、灌浆高度和连接件长度等参数对试件破坏模式和力学性能的影响。结果表明，参数对试件性能的影响不大，表明填充材料主要用于固定钢筋和D‐P接头的相对位置。为了有效节约成本，可以用普通水泥浆代替高强度水泥浆，并适当缩短D‐P接头的长度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Structural Design of Tall and Special Buildings 工程技术-工程：土木

CiteScore

5.30

自引率

4.20%

发文量

审稿时长

6-12 weeks

期刊介绍： The Structural Design of Tall and Special Buildings provides structural engineers and contractors with a detailed written presentation of innovative structural engineering and construction practices for tall and special buildings. It also presents applied research on new materials or analysis methods that can directly benefit structural engineers involved in the design of tall and special buildings. The editor''s policy is to maintain a reasonable balance between papers from design engineers and from research workers so that the Journal will be useful to both groups. The problems in this field and their solutions are international in character and require a knowledge of several traditional disciplines and the Journal will reflect this. The main subject of the Journal is the structural design and construction of tall and special buildings. The basic definition of a tall building, in the context of the Journal audience, is a structure that is equal to or greater than 50 meters (165 feet) in height, or 14 stories or greater. A special building is one with unique architectural or structural characteristics. However, manuscripts dealing with chimneys, water towers, silos, cooling towers, and pools will generally not be considered for review. The journal will present papers on new innovative structural systems, materials and methods of analysis.