中美两国混凝土规范中板挠度变形力学模型的计算对比

发布时间：2019-04-30 15:36

【摘要】：在实际工程中应用中,钢筋混凝土板是使用非常广泛的结构件之一,混凝土板的设计是土木工程结构设计的基础,但目前混凝土板的挠度没有专门的计算公式,通常是通过借用由梁推导出板的挠度公式。同时不同国家对工程领域所遵循的设计规则存在一定的差异,本文针对中美两国在建设领域在挠度计算方面设计规则的差异,对我国《混凝土结构设计规范》(GB50010-2010)和美国ACI318M-08相关挠度的计算规范进行了对比分析,并设置了3组试验。结果表明,中国规范和美国规范均未能较好对混凝土板的挠度变化进行描述。采用这两个规范计算挠度,会对板结构的使用性和可靠度造成影响,中美的规范均未对板弯曲的双向性进行深入考虑;在计算混凝土板挠度时,因梁受力比较复杂,套用梁的公式计算挠度会产生较大误差。
[Abstract]:In practical engineering, reinforced concrete slab is one of the widely used structural members. The design of concrete slab is the foundation of civil engineering structural design, but at present there is no special formula to calculate the deflection of concrete slab. The deflection formula of the plate is usually derived by borrowing the beam. At the same time, there are some differences in the design rules that different countries follow in the engineering field. This paper aims at the difference of the design rules in the construction field between China and the United States in the calculation of deflection. This paper makes a comparative analysis between the Code for the Design of concrete structures (GB50010-2010) in China and the relevant deflection calculation codes of ACI318M-08 in the United States, and sets up three groups of tests. The results show that neither the Chinese code nor the American code can well describe the deflection of concrete slabs. Using these two codes to calculate deflection will affect the usability and reliability of plate structure. Neither of the Chinese and American codes take into account the bidirectivity of plate bending. When calculating the deflection of concrete slab, due to the complicated force of the beam, the formula used for calculating the deflection of the beam will produce a large error.
【作者单位】：中国核电工程有限公司;
【分类号】：TU375.2

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