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

Prediction of Shear Capacity of Uhpc – Concrete Composite Structural Members Based on Existing Codes

“…This section gives the parameters of RC slabs strengthened with various UHPC configurations that were previously tested by Yin et al (2017) and summarises the test results, which were used to validate the analytical methods in the present study. The different UHPC thicknesses and the presence or absence of the additional steel rebar in UHPC layer of the slab specimens as seen in Figure 1 could allow to assess the influence of the suitability of the methods for calculating the shear capacity.…”

“…The different UHPC thicknesses and the presence or absence of the additional steel rebar in UHPC layer of the slab specimens as seen in Figure 1 could allow to assess the influence of the suitability of the methods for calculating the shear capacity. The full details of the previous experiment can be found in the original document (Yin et al 2017).…”

“…Over the last two decades, many experimental studies have been conducted on UHPC-concrete composite members (Brühwiler, Denarie 2008;Alaee, Karihaloo 2003;Habel et al 2007;Noshiravani, Brühwiler 2013a, 2013bYin et al 2017). The excellent properties of UHPC in terms of strain hardening and energy absorption (Graybeal, Baby 2013; Habel 2004;Yoo, Banthia 2016;Graybeal 2005;Yoo, Yoon 2016;Wille et al 2014) lead to members showing significantly improved structural performance after being strengthened with a UHPC layer.…”

“…The excellent properties of UHPC in terms of strain hardening and energy absorption (Graybeal, Baby 2013; Habel 2004;Yoo, Banthia 2016;Graybeal 2005;Yoo, Yoon 2016;Wille et al 2014) lead to members showing significantly improved structural performance after being strengthened with a UHPC layer. In addition, UHPC has been applied to the strengthening of RC members in the form of precast plates (Alaee, Karihaloo 2003), overlays (Habel et al 2007;Noshiravani, Brühwiler 2013b;Oesterlee 2010), and patch material for rehabilitation (Yin et al 2017). UHPC has been shown to greatly influence the overall response of structural members, including their cracking development patterns, ultimate strength, and ductility.…”

“…For this purpose, this paper introduces six methods of predicting the shear capacity of UHPC-concrete composite members based on modifications to existing design models. Nine UHPC-concrete composite slabs tested by Yin et al (2017) were used to verify the proposed methods. The remainder of this paper is organized as follows.…”