Folded plate roofs are widely used in building roofs due to their light weight and high stiffness. However, traditional folded plate roofs are often limited in application due to insufficient stiffness under the current trend of pursuing larger-span roofs. Ribbed folded plate roofs can effectively solve this problem because ribs not only increase the stiffness of the roof and reduce stress concentration, but they are also easy to be formed into various shapes to meet different needs for buildings. Therefore, the detailed analysis was carried out on a reinforced concrete ribbed folded plate roof (RCRFR) under the vertical uniform load to investigate its static behavior. The bearing capacity, failure mode, load–displacement relationship, and strain variation were obtained through the test. Additionally, based on the finite element (FE) method, not only a comparison was conducted between RCRFR and reinforced concrete ribless folded plate roof (RCLFR), but the influence of material nonlinearity and geometric nonlinearity on the structure was also investigated. Moreover, the bending characteristics of RCRFR under design load were analyzed based on the reproducing kernel particle method. The experimental results showed that this structure had good mechanical properties within the design load. In the overload stage, the concrete on the underside of the structure was severely damaged. Furthermore, the yielding of the ribbed plate's reinforcing bars caused the increased vertical deformation difference between the ribbed plate and the top chord, and the ribbed plate and the central ridge beam. Eventually, the failure of the anchorage of the ribbed plate's reinforcing bars anchored in the central ridge beam and the top chord led to the loss of structural load-bearing capacity. The FE analysis results demonstrated that ribs enhance the stiffness of the structure, with material nonlinearity having the primary impact and geometric nonlinearity exerting a secondary effect. The meshfree method analysis was in concordance with the experimental results as well as those of the FE analysis.

中文翻译：

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竖向均布荷载作用下肋骨折板屋面的静力性能——试验研究及无网格法分析

折板屋面因其重量轻、刚度高而广泛应用于建筑屋面。然而，在当前追求大跨度屋面的趋势下，传统折板屋面往往因刚度不足而限制其应用。带肋折板屋顶可以有效解决这一问题，因为肋不仅增加了屋顶的刚度，减少了应力集中，而且还易于成型为各种形状，以满足建筑物的不同需求。因此，对竖向均匀荷载作用下的钢筋混凝土肋折板屋面（RCFRR）进行了详细分析，研究其静力性能。通过试验获得了承载能力、失效模式、载荷-位移关系和应变变化。此外，基于有限元（FE）方法，不仅对RCFRR与钢筋混凝土无肋折板屋盖（RCLFR）进行了比较，还研究了材料非线性和几何非线性对结构的影响。此外，基于再现核粒子法，对RCRFR在设计载荷作用下的弯曲特性进行了分析。实验结果表明，该结构在设计载荷范围内具有良好的力学性能。在超载阶段，结构底部的混凝土遭到严重破坏。此外，肋板钢筋的屈服导致肋板与上弦、肋板与中心脊梁之间的竖向变形差增大。最终，锚固在中央脊梁和顶弦上的肋板钢筋锚固失效，导致结构承载能力丧失。有限元分析结果表明，肋增强了结构的刚度，材料非线性具有主要影响，几何非线性具有次要影响。无网格法分析与实验结果以及有限元分析结果一致。