Shear Strength Investigation of Concrete Girders with Proposed Horizontal Shear Reinforcements in Webs

摘要

The horizontal web reinforcement arranged along the depth of the web was proposed as integratedrnshear reinforcement with stirrups. According the plane-section assumption, the shear strengthrnprovided by compression stresses in the concrete at ultimate stage can be calculated. A series ofrnmodel girders with horizontal reinforcement in webs were fabricated and tested. The tests show thatrnthe horizontal web reinforcements can not only carry the horizontal component of therndiagonal-tension stress, but also delay the occurrence of diagonal cracking, and reduce the width ofrndiagonal cracks, and increase the rigidity and shear strength of beams effectively.