reinforcing girder
2.In addition, moreover the Pre-stressed strands which are anchoraged in the box girder webs produce great influence on the anchorage concrete zone,and the variant longitudinal Pre-stressed strand arrangements produce great influence of the inner inforce of the box girder upper plate,so it is paid attention to in design through collocating a number of common reinforcing steel bar.
3.Based on the minimum potential energy principal, the influences of three loads, which are concentrated force, trapezoidal load and sinusoid load, over shear lag of cantilever single-box-single-cell box girder are deducted and discussed, and a conclusion is reached, which has some instructive significance for designer to determine the sectional dimension and reinforcing bars; the bending normal stress changes greatly as considering the shear lag effect.
