钢筋混凝土梁非线性薄层裂缝单元数值模拟研究

从混凝土开裂的机理出发,提出将薄层裂缝单元模型用于钢筋混凝土梁的裂缝分析,可以兼顾离散裂缝模型直观和分布裂缝模型力学模拟性能良好的双重效果,能够将裂缝的力学行为及其对结构的影响较直观、真实的反映出来。编制了较为完善的计算机软件,并进行了算例分析,利用科学计算的可视化技术得到了梁从开始加载到出现裂缝、裂缝扩展和构件破坏的全过程。

Research Into the Numerical Simulation of Nonlinear Finite Crack Element of Reinforced Concrete Beams

In the light of the cracking mechanism of concrete in tension, the paper suggests the application of the folium cracking element model to the analysis of cracks in reinforced concrete beams, with the model having both the advantage of discrete cracking being visible and that of cracking distributing mechanics simulated, which can clearly and visually reflect the mechanical behavior of cracking and the effect of it on the beam. With satisfactory software worked out, and some examples analyzed, the whole process of the cracking of the reinforced concrete beam from the first moment the beam is loaded to the moment cracking occurs in the beam and the cracking develops until the moment the beam fails is visually shown with the help of the visualization technology in scientific computing.