Shear capacity computation of steel reinforced lightweight concrete beams

There are diagonal shear failure and shear bond failure for the shear failure type of the steel reinforced lightweight concrete beams and shear capacity computing methods are investigated for the two failure types. According to relevant experimental results, characteristics of the steel encased normal and lightweight aggregate concrete beams are recognized similarly. Shear failure capacity predict model is proposed based on the technical specification for steel reinforced concrete composite structure. Shear bond capacity formula is deduced considering the existing bond force between the encased steel and concrete interface. Size effect has a great influence on the concrete shear strength, thus, a correction coefficient is proposed in the superposition formulas of diagonal shear failure capacity. The shear capacity is determined by the minimum value of the two failure types. Test results comparison and verification show that the predict model has enough precision which is applicable to steel reinforced normal concrete beams either.