体外预应力在过载结构加固中的应用

摘要

Taking a practical engineering background, discussed in an underground garage has been overloaded condition, the use of internal force control with active support and increase the cross - section method of prestressing reinforced the design process. The design of working conditions through multiple combinations internal force calculation, checked the ultimate bearing capacity of beams, cracking, deflection. And using finite element stress distribution on the beam to check the situation, verify the rationality of its design and reliability.%以某实际工程为背景,描述了某地下车库在已超载工况下,采用内力控制主动支撑结合体外预应力及增大截面方法加固的设计过程.设计中通过多个工况的计算进行内力组合,验算梁的极限承载力,裂缝,挠度.并采用有限元对梁的内力分布情况进行校核,验证了其设计的合理性及可靠性.