Investigation into the flexural performance of novel precast sandwich wall panels

IF 3.4 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Materials and Structures Pub Date : 2024-11-07 DOI:10.1617/s11527-024-02482-z

Chunquan Dai, Mingfa Hou, Ming Huang, Haiyang Yu

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Abstract

The paper focuses on investigating a novel sandwich panel, which incorporates extruded polystyrene foam boards placed between the inner and outer concrete panels. These are connected using various types of shear connectors to achieve a composite action, meeting the bending resistance requirements. To study the structural performance of the sandwich panels, three representative specimens were designed. These specimens employed different types of shear connectors, namely, steel truss connectors with inclined bars at 45°, and GFRP connectors with inclined bars at 45° and 30°, respectively. The specimens underwent full-scale testing using a step-by-step four-point loading method. The test results indicated shear-compression failure of the specimens, exhibiting consistent failure modes across all specimens, and a composite action in resisting bending moments. Based on theoretical stress–strain diagrams and considering the slip phenomenon between the concrete panel and the connectors, this paper establishes an analytical model. It can reasonably estimate the ultimate load-carrying capacity of sandwich insulation panels under shear-compression failure, which has implications for subsequent engineering applications.

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新型预制夹心墙板抗弯性能研究

本文重点研究了一种新型夹芯板，它将挤塑聚苯乙烯泡沫板置于内外混凝土板之间。这些泡沫板通过各种类型的剪切连接器进行连接，以实现复合作用，满足抗弯要求。为研究夹芯板的结构性能，设计了三个具有代表性的试样。这些试件采用了不同类型的剪力连接件，分别是倾斜杆成 45° 的钢桁架连接件和倾斜杆成 45° 和 30° 的 GFRP 连接件。试样采用逐步四点加载法进行了全面测试。测试结果表明，所有试样都表现出一致的剪切-压缩失效模式，并且在抵抗弯矩时具有复合作用。基于理论应力-应变图并考虑到混凝土面板与连接件之间的滑移现象，本文建立了一个分析模型。该模型可合理估算夹芯隔热板在剪切-压缩破坏情况下的极限承载能力，对后续工程应用具有指导意义。

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来源期刊

Materials and Structures 工程技术-材料科学：综合

CiteScore

6.40

自引率

7.90%

发文量

222

审稿时长

5.9 months

期刊介绍： Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.