近场动力学理论在钢筋混凝土结构破坏的研究

Study on reinforced concrete structure failure based on peridynamic theories

近场动力学理论(Peridynamic,PD)用键描述了材料内部的相互作用关系,可分析材料破坏过程中的裂纹扩展。针对由异种材料组成的复合材料-钢筋混凝土构建了其力学模型,提出了同种键和异种键,并修正了键的微模量常数、断裂准则等。通过对钢筋混凝土梁的四点弯曲试验进行数值求解,结果表明该力学模型是可行的。

Peridynamic（ PD） uses ＂bond＂to describe the interaction within the materials,which can be used to analyze the crack extension during the material failure process. In this study,we constructed the mechanical model of the reinforced concrete made of different materials,proposed the concepts of same bond and different bond,and revised the micro-modulus constant and break criterion of the bonds. Through numerical calculation of the four-point bending test data of reinforced concrete beams,we proved that the PD mechanical model is feasible.