桁梁的变位计算,由于杆件数量多,计算颇感繁琐,作方案比较时,若采用精确法,工作量较大,若按实腹梁计算,精度又不能令人满意,这里对桁梁挠度计算作一简化,根据公式便可迅速求算,比较方便。如图1所示的平弦三角型桁架,求其跨中挠度f Truss girder displacement calculation, due to the large number of bars, the calculation is quite cumbersome, for comparison programs, the use of precision, the workload is large, if calculated according to the actual abdominal beam, the accuracy is unsatisfactory, where the truss For a simplified beam deflection calculation, according to the formula can be calculated quickly, more convenient. As shown in Figure 1, the triangular string trusses, find its mid-span deflection f