Structural behavior of reinforced concrete slabs subjected to uniform and concentrated loads

均匀和集中荷载作用下钢筋混凝土板的结构性能

• 批准号: 465438326
• 负责人: Professor Dr.-Ing. Günter Axel Rombach
• 金额: --
• 依托单位: Institut für Massivbau B-7
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/465438326?language=en
• 关键词: Structural; behavior; reinforced; concrete; slabs

The load-bearing behavior of reinforced concrete slabs without stirrups subjected to concentrated loads is of national and international interest for research and practice. In particular, it has not yet been clarified whether a slab fails locally in the area of action, i.e. punching, or as a normal shear failure. Depending on this, the influence of a uniform load has to be clarified.In most experimental investigations of reinforced concrete slabs, the concentrated load was located close to the support, as failure was assumed to occur in this region. However, a series of experiments carried out by the applicant as part of a research project funded by the DFG showed that the shear failure occurs close to the load application, which contradicts the common opinion. The developed new design approach has been included in a German regulation. However, some questions remain unanswered. For example, the influence of the flexural reinforcement on the load-bearing capacity has not yet been sufficiently experimentally verified. In the aforementioned research project, the degree of reinforcement was reduced from ρ_l = 1,16 % to ρ_l = 0,71 % in one experiment, whereby the failure loads hardly changed. The influence of the reinforcement on the load-bearing behaviour is treated differently in various analytical approaches. In a real slab, concentrated loads always act together with uniform loads. The influence of additional uniform and line loads on the load-bearing behaviour of reinforced concrete slabs is to be investigated. Large-scale tests on cantilevered reinforced concrete slabs and numerical analyses are conducted for both topics.

用浓缩载荷承担的钢筋混凝土板的负载是对耳朵和实践的国家兴趣。剪切故障。申请人在由DFG资助的研究项目中执行的剪切失败会结束负载申请，这与开发的新设计方法相矛盾。在上述研究项目中尚未对承载能力的屈曲加强。负载在各种分析方法中的行为不同。对两个主题进行了悬臂重装混凝土板和数值分析的LE测试。