Development of new punching shear reinforcement for footings

新型基础冲切钢筋的开发

• 批准号: 249087059
• 负责人: Professor Dr.-Ing. Josef Hegger
• 金额: --
• 依托单位: Lehrstuhl und Institut für Massivbau
• 依托单位国家: 德国
• 项目类别: Research Grants (Transfer Project)
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/249087059?language=en
• 关键词: Development; new; punching; shear; reinforcement

According to the findings in the previous project, the punching force cause different failure mechanisms in slender and compact footings. While in slender footings the slab rotation controls the fracture kinematics, in compact footings a translational movement of the punching cone is also determining the fracture mechanism. Due to the crack formation and fracture geometry, an inclined punching shear reinforcement system seems to be more effective than vertical bars.The aim of the knowledge transfer project is the development of a specifically optimized punching shear reinforcement system especially for foundations consisting of inclined an vertical reinforcing bars. Compared to conventional punching shear reinforcing elements it is easy to use and leads to a 20-25% higher punching capacity with a low material usage. Along with the application partner, theoretical and experimental investigations are carried out in order to develop an adapted punching shear reinforcement system adjusted to the fracture mechanism of slender and compact footings together with an associated model. The punching tests are also employed for calibration and validation of engineering models.

根据上一个项目的发现，打孔力在细长和紧凑的基础上引起了不同的故障机制。在细长的基础上，平板旋转控制着裂缝运动学，在紧凑的基础上，打孔锥的翻译运动也在确定断裂机制。由于裂纹的形成和断裂几何形状，倾斜的打孔剪切钢筋增强系统似乎比垂直条更有效。知识传递项目的目的是开发特殊优化的打孔剪切钢筋增强系统，尤其是针对由倾斜的垂直加固条组成的基础。与常规的打孔剪切钢筋元素相比，它易于使用，并使材料使用量低20-25％。与应用程序合作伙伴一起，进行了理论和实验研究，以开发适合于细长和紧凑型基础的断裂机制以及相关模型的适应性打孔剪切加固系统。还采用了打孔测试来校准和验证工程模型。

项目成果

Durchstanztragverhalten von Einzelfundamenten mit einer neuartigen Durchstanzbewehrung

新型冲剪钢筋个体基础的冲剪承载性能

• DOI: 10.1002/best.201500071
• 发表时间: 2016
• 期刊: Beton‐ und Stahlbetonbau
• 作者: Kueres;Ricker;Häusler;Hegger
• 通讯作者: Hegger