Fully clamped reinforced concrete (RC) slab is a common structural component possessing better load-carrying capacity over simply supported slab. Currently, typical yield line theory is a popular approach to estimate the bearing capacity of fully clamped RC slab, although it would greatly underestimate the actual ultimate resistance. This paper is devoted to enriching the knowledge of membrane action and its contribution to the load-carrying capacity of the clamped slab. The resistance trajectory of fully clamped RC slab from loading to failure undergoes three phases: the ascending branch raised by outward movement prevention, the descending branch due to crushed concrete and the re-ascending branch caused by reinforcement strain. Applied load–deflection curves of RC slab accompanying compressive-membrane actions are achieved according to the bending theory of normal cross-section. The reserve capacities accompanying tensile-membrane actions in the condition of large deformations are further derived. The whole load–deflection curves that considered compressive-tensile membrane effects are finally presented, where the mid-span displacements are revised by the deflection equations and the softening coefficient of flexural rigidity. It is indicated that the load–deflection relationships of fully clamped RC slabs can be reasonably depicted by taking compressive-tensile membrane effects into account, which are fairly different from yield line approaches. Comparative analysis shows that analytical results are in good agreement with experimental data reported by Park et al. and illustrates that the proposed model is capable of predicting the bearing capacity of fully clamped RC slab with very good accuracy.

中文翻译：

---

全夹紧钢筋混凝土板伴随压张膜作用的承载能力：一种理论方法

全夹紧钢筋混凝土（RC）板是一种常见的结构构件，具有比简支板更好的承载能力。目前，典型屈服线理论是一种流行的方法来估计完全夹紧的钢筋混凝土板的承载力，尽管它会大大低估实际的极限阻力。本文致力于丰富膜作用的知识及其对夹板承载能力的贡献。全夹紧钢筋混凝土板从加载到破坏的阻力轨迹经历了三个阶段：防止外移引起的上升支路、混凝土压碎引起的下降支路和钢筋应变引起的重新上升支路。根据法向截面弯曲理论，得到了钢筋混凝土板随压膜作用的荷载-挠度曲线。进一步推导了在大变形条件下伴随拉膜作用的储备能力。最后给出了考虑压拉膜效应的整个荷载-挠度曲线，其中跨中位移通过挠度方程和抗弯刚度软化系数进行了修正。结果表明，考虑压拉膜效应，可以合理地描述完全夹紧的RC板的荷载-挠度关系，这与屈服线方法有很大不同。对比分析表明，分析结果与 Park 等人报道的实验数据吻合较好。