Experimental and Numerical Investigation on the Behaviour of Precast Concrete Sandwich Panels with Different Shear Connectors

IF 1.7 4区 工程技术 Q3 ENGINEERING, CIVIL
Allah dad Ahmadi, Ashkan Torabi, Arash. Totonchi, Davoud Safari
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Abstract

This paper presents the results of experimental and numerical investigations on precast concrete sandwich panels (PCSPs) as one-way slab tested under flexural load. These panels consist of three layers: an ordinary reinforced concrete layer as the upper layer, a thick lightweight concrete layer as the core, and a lightweight concrete and tension-resistant reinforced ordinary concrete layer as the bottom layer. The common method to join the layers together against the inter layer shear force is carid out by means of truss shear connectors. As a novel method an egg-shaped shear connector were proposed and tested in this research. The behavior of four PCSPs were studied under four-point displacement control monotonic test. The sandwich panels with egg-shaped shear connectors exhibited higher ductility and toughness under flexural loading than those with truss-shaped shear connector. In addition, the sandwich panels with two concrete layers had a smaller linear region stiffness than those with three concrete layers. Furthermore, finite element (FE) models were developed in the ABAQUS to investigate the effects of orientation of shear connectors. Eventually, analytical computation was performed to obtain the ultimate flexural capacity of the panels and were compared with the results of experimental and FE models. The results showed a significant degree of accuracy. Therefore, the PCSP slab can serve as an alternative to the normal concrete slab system in buildings.

Abstract Image

采用不同剪力连接件的预制混凝土夹芯板行为的实验和数值研究
本文介绍了预制混凝土夹芯板(PCSP)作为单向板在抗弯载荷下进行测试的实验和数值研究结果。这些板由三层组成:普通钢筋混凝土层作为上层,厚轻质混凝土层作为核心层,轻质混凝土和抗拉钢筋普通混凝土层作为底层。通过桁架剪力连接件将各层连接起来以抵御层间剪力的常用方法是桁架剪力连接件。作为一种新方法,本研究提出并测试了蛋形剪力连接器。研究了四种 PCSP 在四点位移控制单调试验下的行为。与使用桁架形剪力连接器的夹芯板相比,使用蛋形剪力连接器的夹芯板在弯曲荷载下表现出更高的延展性和韧性。此外,与三层混凝土夹芯板相比,两层混凝土夹芯板的线性区域刚度较小。此外,还在 ABAQUS 中开发了有限元(FE)模型,以研究剪力连接器方向的影响。最后,通过分析计算得出了面板的极限抗弯能力,并与实验和 FE 模型的结果进行了比较。结果显示了相当高的精确度。因此,PCSP 板可作为建筑物中普通混凝土板系统的替代品。
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来源期刊
CiteScore
3.30
自引率
11.80%
发文量
203
期刊介绍: The aim of the Iranian Journal of Science and Technology is to foster the growth of scientific research among Iranian engineers and scientists and to provide a medium by means of which the fruits of these researches may be brought to the attention of the world’s civil Engineering communities. This transaction focuses on all aspects of Civil Engineering and will accept the original research contributions (previously unpublished) from all areas of established engineering disciplines. The papers may be theoretical, experimental or both. The journal publishes original papers within the broad field of civil engineering which include, but are not limited to, the following: -Structural engineering- Earthquake engineering- Concrete engineering- Construction management- Steel structures- Engineering mechanics- Water resources engineering- Hydraulic engineering- Hydraulic structures- Environmental engineering- Soil mechanics- Foundation engineering- Geotechnical engineering- Transportation engineering- Surveying and geomatics.
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