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给出了2010年广州亚运会排球馆预应力大梁的布置,定量比较了相距3m的两榀框架梁底设板连成箱形截面前、后,两根大梁竖向变形的均匀性、大梁的侧向变形、大梁两侧有高差且不等跨次梁的竖向变形、梁端负弯矩等变化。针对大梁长跨与短跨相连时短跨范围内负弯矩迅速衰减以及短跨内曲线预应力筋摩擦损失大的情况,给出了该大梁预应力筋线型的布置方案。同时给出了预应力大梁的材料及工艺选择,预应力筋的选配,非预应力筋的确定,大梁裂缝、挠度验算等计算分析的过程。
The layout of the prestressed girders of the Guangzhou Asian Games Volleyball Pavilion in 2010 is given. The vertical deformation of the two girders is compared quantitatively with the girders Lateral deformation, beam height difference on both sides and not equal to the vertical beam deformation, beam end negative moment changes. Aiming at the rapid decay of negative moment in short span and the large frictional loss of prestressing tendons in short span when long span and short span are connected, At the same time, the process of calculation and analysis of material and process of prestressed girder, selection of prestressing tendons, determination of non-prestressed tendons, checking of girder cracks and deflections are given.