Shear load design : comparison between EC 2, EHE-08, FIB Model Code and the new proposal of Dr. Antoni Cladera Bohigas

Abstract

Trabajo Fin de Grado en modalidad de Intercambios Académicos: University of Applied Sciences. FH Campus Wien (Austria).

The objective of the study is to carry out a comparative analysis of technical terms between the normative of shear design of reinforced concrete in Spain, Austria, the FIB Model Code and the new proposal of Dr. Antoni Cladera Bohigas. For this, firstly a study on the historical development of knowledge and rules used from the beginning of the common use of structural concrete until today has been conducted, mainly dwelving into the current state of knowledge. Subsequently, starting from beam dimensions and specific parameters, the stress bearing ablity of the beams has been calculated, in accordance to each of the standards aforementioned. The main conclusions obtained from the analysis are, the significant difference observed in relation to the cracking angles of the piece considered for the design and the contribution of the concrete to shear stress, which shows considerable variation in the resistance of the workpiece. Thus, it appears that the latest regulations included in the FIB Model Code minimize the ratio of breaking angles. In addition to that the proposal of Dr. Antoni Cladera Bohigas also determines a particular breaking angle, depending on the depth of the neutral axis and the effective depth to obtain more exact figures. Furthermore the contribution of the concrete along the shear reinforcement is taken into consideration, which is also taken into account in the EHE-08. Thus, one can conclude that the line of development of the shear design takes into account the resistance provided by the concrete, as the cracking angle of the piece tends to be more accurately defined.