Experimental investigation on the behaviour of reinforced concrete slabs strengthened with ultra-high performance concrete

被引：138
作者：
Hor, Yin [1 ]
Teo, Wee [2 ]
Kazutaka, Shirai [3 ]
机构：
[1] Hokkaido Univ, Grad Sch Engn, Kita 13,Nishi 8, Sapporo, Hokkaido 0608628, Japan
[2] Heriot Watt Univ Malaysia, Sch Energy Geosci Infrastruct & Soc EGIS, Jalan Venna P5-2,Precinct 5, Putrajaya 62200, Malaysia
[3] Hokkaido Univ, Fac Engn, Kita 13,Nishi 8, Sapporo, Hokkaido 0608628, Japan
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2017年 / 155卷
关键词：
Composite UHPC-concrete slabs; UHPC overlay; Rehabilitation; Structural behaviour; Shear capacity; Ductility; BEAMS; SHEAR; POWDER; MEMBERS;
D O I：
10.1016/j.conbuildmat.2017.08.077
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Nine rectangular specimens were tested to investigate the behaviour of composite reinforced concrete (RC) slabs strengthened with ultra-high performance concrete (UHPC). The specimens were two series with various UHPC strengthening configurations. The first, a rehabilitation series, tested UHPC as patch material for repairing deteriorated concrete structures. The second, a UHPC overlay series, was used to retrofit soffits of RC members. The results showed that using the rehabilitation series, the UHPC reduced diagonal cracking and developed more flexural cracks as compared to RC slabs with no UHPC strengthening. The UHPC exhibited excellent energy absorption with extensive deflection hardening and ductility during the post cracking range. In the UHPC overlay series, each slab showed diagonal shear cracks and debonding modes. The UHPC overlay delayed the development of shear cracking. As the overlay thickness increased, the ultimate load increased; but the tendency for the UHPC to undergo fracture failure also increased. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：463 / 474
页数：12
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