The impact of reinforced concrete on the modern-day architectural heritage of Algeria

Abstract

This article presents the results from an experimental analysis supplemented by a systematic exploitation of the archival sources of the Sacred Heart of Jesus of Algiers (Algeria). Built in 1956, this church is a revolutionary example of modern architecture using concrete material. It is one of the major achievements that participated in producing part of an abstract heritage. Through its very fine structure and construction technique, reflected by the hyperbolic tower as well as the hyperbolic paraboloids and thin V-shaped walls, the church reveals the great possibilities offer by concrete. The general shape of its plan strikingly reminds the symbolic fish of the first Christians with a huge nave measuring 52 m in length and 35 m in width. A numerical analysis was carried out using finite elements method including new Algerian seismic provisions. A non-destructive testing campaign was also performed using the SonReb method which could be used as a decision-making tool for possible repairs or reinforcements.The results obtained confirm both the stability and integrity of this architectural work. According to the current Algerian seismic code, the deformations and stresses in the basilica structure remain stable. The quality of the concrete with regard to its compressive strength is very satisfactory. This gives a great degree of reliability on the good choice of materials, as much as on the design adopted for the construction of the sacred basilica heart of Algiers.