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含水率对混凝土力学性能有较大的影响,目前对混凝土含水率的研究主要集中在对混凝土材料的物理试验上,对混凝土构件的理论研究鲜有报道。假定混凝土梁中含水率沿截面高度的变化规律,得到均布荷载作用下梁中应力及挠度的显示表达式,并结合算例给出不同含水率分布情况下混凝土简支梁典型断面应力及挠度分布规律,探讨含水率变化对梁受力特性的影响规律,为服役在水位变幅工况下的混凝土结构的安全度评价提供理论依据。
Moisture content of concrete mechanical properties have a greater impact, the current study of concrete moisture content mainly in the physical testing of concrete materials, the theoretical study of concrete members rarely reported. Assuming the variation law of the water cut along the section height of the concrete beam, the expression of the stress and deflection in the beam under the uniform load is obtained. The stress and deflection of the typical section of the concrete simply supported beam with different water cut distributions Distribution law to investigate the influence of moisture content on the behavior of the beam, and provide a theoretical basis for the safety evaluation of concrete structures under service conditions of water level fluctuation.