Development of an analytical model for the shear strength of sandwich beams using textile-reinforced concrete and lightweight concrete based on the strut-and-tie method

Abstract

The study and development of lightweight structures are prioritized in the construction industry, particularly through the optimal combination of high-strength and lightweight materials. Sandwich beams are a typical example of such a structure. Textile-reinforced concrete (TRC), with its outstanding advantages, has been developed as a load-bearing shell in sandwich structures. When combined with lightweight concrete (LC), a sandwich structure with high load-bearing capacity, environmental sustainability, and low weight is created. This paper presents the findings of research into developing a model to determine the shear strength of sandwich structures made of textile-reinforced concrete and lightweight concrete. The shear strength calculation model for sandwich beams based on the strut-and-tie method reflects the influence of the strength of TRC, LC, and the bonding properties between material layers. The model has been validated with experimental results, showing a deviation of less than 9.3%, confirming its reliability and suitability for sandwich structures using TRC and LC.