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

Abstract

Reinforced concrete (RC) structural members strengthened with ultrahigh-performance concrete (UHPC) have shown excellent performance in past experimental investigations. However, methods of predicting their capacity are currently very limited. This paper presents six independent methods of predicting the shear capacity of UHPC–concrete composite members based on the application of existing design codes. Three of these methods are based on the conversion of the volume fraction of steel fibres in the UHPC in an equivalent longitudinal steel ratio. The other three methods involve the computation of the shear strength as a sum of the contributions to the shear strength by the RC member and the UHPC layer, each of which is independently calculated. It was demonstrated that the proposed methods based on existing design codes are able to predict the strength of UHPC–concrete composite members with reasonable accuracy.

Numerical Simulation of the Blast-Resistant Response of Ultrahigh-Performance Concrete Structural Members

“…As shown in Figure 12, the implicit and explicit load-deflection curves showed similar performance and agreed well with the experimental results for both specimens RE-0 and RE-100. It is worth noting that the strength capacity of specimens RE-0 and RE-100 was analytically predicted by Yin, Shirai, and Teo (2018).…”

Study on flexural and shear performance of ultra‐high performance concrete prefabricated pi‐beams

“…16,17 The findings indicate that UHPC significantly enhances the flexural strength and stiffness of the NC component, leading to improved overall structural performance. 18,19 Furthermore, the bond between UHPC and NC has been proven reliable, ensuring effective load transfer and composite action between the materials. 20 Many scholarly investigations have employed scaled beam specimens in their research, providing a consolidated understanding of UHPC beam behavior.…”

“…The studies have focused on the cracking capacity, ultimate load‐carrying capacity, deformation characteristics, failure modes, and bond strength between the two materials 16,17 . The findings indicate that UHPC significantly enhances the flexural strength and stiffness of the NC component, leading to improved overall structural performance 18,19 . Furthermore, the bond between UHPC and NC has been proven reliable, ensuring effective load transfer and composite action between the materials 20 .…”