STRENGTH AND CRACK GROWTH RESISTANCE ANALYSIS OF REINFORCED CONCRETE STRUCTURES OF TUNNEL TYPE ON THE HIGHWAYS
Reinforced concrete vaulted tunnel designs type are very perspective type of structures and having many advan­tages compared to conventional designs, they are widely used in the highway and railway system. Making a folded shape of cross-section of arches (triangular, trapezoidal), or wavy shape can achieve a corresponding reduction in the consumption of materials and at the same time maintaining its carrying capacity. Given the above advantages for the widespread introduction of reinforced concrete in the construction of vaulted structures, a very important task is to determine the bearing capacity with performing the appropriate calculations on strength and crack growth resistance. in 2012-2014 years «Rivo precast» Ltd Company had patented and built in Malaysia a double-joint reinforced con­crete design under embankment with height till 1 m and span 20 m of precast component of folded cross-section manufactured at the plant of the same company. At present is an ongoing examination of these structures up to com­missioning. By order of directory of Ltd.«Rivo precast» for the inspection the operational reliability of the precast unit authors have studied its carrying capacity. This article describes the technique and the results of strength and crack growth resistance analysis of reinforced concrete arched structure of a tunnel-type with folded cross section exposed to permanent and temporary loads.