基于弹性应力配筋法的现浇混凝土空心楼盖的优化设计方法研究

Research on optimal design method for cast-in-situ concrete hollow floor based on elastic stress reinforcement method

针对目前现浇混凝土空心楼盖优化设计研究中造价计算不准确的困境,本文提出了基于结构承载能力和裂缝宽度控制的实用弹性应力配筋法,并据此提出了包含空心楼盖造价、承载能力极限状态和正常使用极限状态的优化设计模型及对应的优化设计方法。单层地下室顶板空心楼盖的优化设计结果表明,该优化设计方法的优化结果可显著降低空心楼盖造价和弹性挠度,并为解决空心楼盖参数优化设计提供了一条有效途径,并且考虑了裂缝宽度控制的实用弹性应力配筋法也可广泛应用于复杂混凝土结构的配筋计算。

According to inaccurate calculation of the cost in the research of optimal design for cast-in-situ concrete hollow floor,a practical elastic stress reinforcement method based on structure ultimate limit states and cracks was put forward.Then the optimal design model which include the cost of hollow floor,structure ultimate limit states and serviceability limit states can be obtained,and its optimal method was given. The results of single floor basement applied hollow floor reflect that the solutions of optimal design method have a less cost and deflection. So an effective way to conduct optimal design for cast-in-situ concrete hollow floor is provided,and the practical elastic stress reinforcement method is a versatile tool in reinforcement calculation of complex structure.