Response of Reinforced Concrete Box Girders Strengthened with composite Materials

Abstract

The current research includes the results of a practical and numerical program to determine the best way to enhance the behavior of RC box beams where the practical program relied on casting and testing 15 samples under bending. The factors that were taken into account were the use of ferrocement laminate at the tensile side or in the form of a U-shape, the number of meshes, as well as its type (welded or expanded) and the use of composite materials (CFRP, GFR). For composite materials, the strengthening was carried out in different ways, where it was applied at the tensile side only and wrapping the composite material around the web like a U-shape along the total beam’s length or as strips with different sizes and spacing. The outcomes showed that the girders strengthened by 4 GFRP and 1 CFRP layers as a U-shaped have the highest service load and ultimate load.

Experimental and finite element study of the application of ferro cement composite on runway rigid pavement

“…The ller material is reinforced with layers of reinforcing mesh in both principal directions. However, the subdivision and distribution of ductile material (wire mesh) throughout the matrix increase its elasticity [2,3,4].For this study, 18 different ferrocement slabs of dimensions 400mm X 400mm X 50mm and reinforced with 1Ø5.5 every 100 mm were casted with alteration in the combinations of mesh layers, and test results were analyzed.The impact load testing has been performed after the slabs have been heated in the oven for 24 hours at a temperature of 50°C and 100°C. The impact loading was applied to the specimens by dropping a 5-kg steel ball from a height of 1 m at the center of the slabs.…”

“…The ller material is reinforced with layers of reinforcing mesh in both principal directions. However, the subdivision and distribution of ductile material (wire mesh) throughout the matrix increase its elasticity [2,3,4].…”