Analysis of lateral stiffness influence on the prestressing force of frame

The lateral stiffness influence of the frame column on the effective prestressing force of the beam is analyzed as different frame construction types are considered,and the estimation formulas of the losses are deduced.The project of Hefei People Fitness and Training Hall is analyzed by building models with applied analysis software.The influences of column section sizes,storey heights,beam span numbers on the 35 m single-span beam prestressing force are researched,and the influence under different construction orders is also studied.The results show that the influence of storey height on the beam prestressing force is not linear.When the height is lower than 6 m,the loss of the beam prestressing force caused by lateral stiffness will be bigger;and the loss of the beam prestressing force caused by the lateral stiffness of the project is about 5%.