PKPM(PREC)软件考虑温度内力的预应力混凝土结构实用计算方法

A PRACTICAL CALCULATION METHOD OF PRE-STRESS CONCRETE STRUCTURE CONSIDERING TEMPERATURE INTERNAL FORCE WITH PKPM(PREC)SOFTWARE

现有的PKPM(PREC)软件进行预应力混凝土结构计算时还不能考虑温度内力的影响,这对纵向较长的厂房结构是偏不安全的。提出了采用PKPM(PREC)软件结合PKPM(PMSAP)软件考虑温度内力进行预应力混凝土结构的计算方法。得到了温度影响下的预应力筋配筋量及相应的裂缝宽度及挠度。使得用PKPM(PREC)软件进行预应力混凝土结构计算考虑温度内力的影响成为可能。此外温度内力计算时,考虑了预应力梁及其他相关构件的刚度折减,使计算所得的温度内力较常规方法减少较多,更符合实际情况。

By now,pre-stress concrete temperature stress effect cann't be considered with PKPM(PREC)software,this is not safe for the workshop structure of longer longitudinal.A PKPM(PREC)software combination PKPM(PMSAP)software method is adopted to analyze pre-stress concrete temperature stress.pre-stress reinforcing bar quantities,crack widths and deflections are obtained under temperature stress effect.It becomes possible to consider temperature stress calculating pre-stress concrete structure by PKPM(PMSAP)software.Moreover,the stiffness reduction factor of pre-stress beams and other components are taken in,temperature internal forces gotten by calculation are decreased than conventional method,which coincides well wrth actual condition.