【摘要】 基于实际工程介绍了预应力混凝土转换梁的设计。合理选择裂缝控制要求 ,以求达到安全与经济的统一 ,对分两批张拉的预应力转换梁在各种荷载不利组合下的应力进行了计算 ,对有多束线型的预应力筋损失值σl1,σl2 提出了简化计算的方法。对同类工程有一定的参考价值更多还原

【Abstract】 Basing on a practical example,the design of prestressed conversion girder of a tall building are introduced.For the safe and economic purposes,a crack-controlling criterion should be properly chosen.The concrete stress of the conversion girder with two-time-prestressed strands under several unfavourable load combinations is calculated.The method of calculating the stress loss of the concrete girder with several linetype prestress strands is simplified,which may be useful for the similar projects.更多还原