预应力螺旋肋钢棒的锚固可靠度计算

摘要

以预应力螺旋肋钢棒为研究对象，通过拉拔试验得到了极限粘结强度的计算公式，针对锚固极限状态，采用Hasofer-Lind一次二阶矩法进行了可靠度计算，并提出了预应力螺旋肋钢棒锚固长度的设计公式，有利于该材料的推广应用。%Taking the prestressed spiral ribbed steel bar as the research object,the paper concludes the calculation formula for the ultimate bond stress by the drawing test,adopts Hasofer-Lind First-order Second-moment Method according to the anchorage ultimate status,and points out the design formula of the prestressed spiral ribbed steel bar in common projects,so as to expand its application.