Composite behaviour of wide sandwich panels with thin high performance recycled aggregate concrete wythes with fibre reinforced polymer shear connectors

IF 3 Q2 ENGINEERING, CIVIL
J. Lipczynska, R. West, M. Grimes, D. Niall, O. Kinnane, R. O’hegarty
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引用次数: 3

Abstract

ABSTRACT The traditional means of using precast concrete sandwich panels are restrictive in terms of applications, where thick wythes result in heavy panels which are often unsuitable in retrofitting domestic and commercial buildings. As concrete sandwich panel technology has evolved to make it more widely accessible, recent research work has demonstrated that it is possible to achieve thermally efficient partial composite action within a thin wythe panel provided non-conductive shear connectors are used. This paper examines high performance recycled aggregate concrete in heavily insulated non-load-bearing panels for retrofitting domestic and commercial buildings. A series of concrete mixes were tested to develop one which would be more sustainable than the widely accepted standard mixes for wythes. Different 220 mm thick concrete sandwich panels were tested consisting of 20 mm thick fibre-reinforced recycled aggregate concrete wythes and a 180 mm layer of XPS insulation. Unconnected and shear connected panels were tested in flexure in a displacement control test. The effects of composite action and post-cracking toughness were examined and it was concluded that a shear connected panel comprising sustainable thin recycled aggregate concrete wythes enclosing a thick layer of insulation is a feasible product to use for light high-performance sandwich panels.
纤维增强聚合物抗剪连接件高性能再生骨料混凝土夹层宽夹芯板的复合性能
摘要使用预制混凝土夹芯板的传统方法在应用方面受到限制,因为厚的夹层会导致重型夹芯板,而这些夹芯板通常不适合用于改造住宅和商业建筑。随着混凝土夹芯板技术的发展,使其更容易获得,最近的研究工作表明,如果使用非导电抗剪连接件,可以在薄的Y型夹芯板内实现热高效的部分复合作用。本文研究了用于改造住宅和商业建筑的高性能再生骨料混凝土,用于高度隔热的非承重面板。对一系列混凝土混合料进行了测试,以开发出一种比广泛接受的wythes标准混合料更可持续的混合料。测试了不同的220毫米厚的混凝土夹芯板,包括20毫米厚的纤维增强再生骨料混凝土夹层和180毫米厚的XPS隔热层。在位移控制试验中,对未连接和剪切连接的面板进行了弯曲试验。研究了复合作用和开裂后韧性的影响,得出的结论是,由可持续的薄再生骨料混凝土夹层组成的剪切连接板是一种用于轻质高性能夹芯板的可行产品。
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
CiteScore
3.90
自引率
9.50%
发文量
24
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