圆钢管约束高强灌浆料局部承压性能研究

Local Compressional Behavior of Circular Tubed High Strength Grouting Material

以圆钢管约束高强灌浆料局部承压性能试验为基础,基于ABAQUS有限元计算平台,通过建立分段模型(Multi-section Model简称MSM模型)进行数值模拟,探究圆钢管约束高强灌浆料在局部承压作用下的力学性能,并将软件计算得到的荷载-位移曲线与试验结果进行对比分析。结果表明,分段模型适用于圆钢管约束高强灌浆料局部承压作用下的数值模拟,且计算结果与试验结果吻合较好;增大试件高径比、钢管壁厚和高强灌浆料强度均可提高其极限承载力。

In early experiments,the authors researched the force characteristics and failure modes of high strength grouting material in circular tubes with different thicknesses and forms.It was determined that the failure mode of the test pieces is that of shear failure and that the ultimate bearing capacity of the test pieces increases with an increase in the thickness of tube.Based on experiments on the local compression behavior of circular tubed high strength grouting material,a numerical simulation is conducted by establishing a multi-section model（MSM model）using the ABAQUS finite element computing platform.In addition,the mechanical properties of high strength grouting material confined by circular steel tube under local compression are investigated.Load-displacement curves calculated by the software are then compared with experimental results.Results show that the MSM model is applicable for conducting numerical simulations of circular tubed,high strength,grouting material under local compression.Calculated results are in good agreement with test results,and the bearing capacity can be improved by an increase in the following：the height-to-diameter ratio of samples,thickness of the steel tube,and strength of the high strength grouting material.