摘要
为了评判细砂路基长期性能和工程适用性,以海南省某公路沿线广泛分布的两种细砂为例,使用室内重复加载动三轴试验方法进行动态回弹模量试验。试验结果表明,在较为不利的物理状态下两种砂样的动态回弹模量值仍然高于30MPa,同时细砂动态回弹模量对含水率的敏感程度较低较黏土与粉土低,可见良好压实的细砂路基的长期性能将更稳定。三参数复合模型对试验测试结果拟合程度较好,相关系数大于0. 97。基于相关物性指标建立一套具有较高的准确度的模型参数回归方程,可在预估区域内其他细砂的动态回弹模量时起到一定的参考作用。
The traditional concrete structural design uses limit state method to analyze projects based on sections. However, this method is not suitable for complex stress non-linear structural members. The purpose of this paper is to study the structural safety of precast hole-web concrete deep beams and propose feasible analysis methods based on finite element theory. By using virtual simulation calculation method through finite element analysis software, this paper will analyze the application of Strut ＆ Tie modelling method in structural design of precast hole-web concrete deep beams. This paper will also discuss the application of Strut ＆ Tie modelling method in structural safety analysis by using some precast hole-web concrete deep beam project cases and use Strut ＆ Tie modelling method to calculate the internal force of precast hole-web concrete deep beam to solve practical engineering problems. Eventually, a feasible design method for precast hole-web concrete deep beams will be concluded.
作者
周定
ZHOU Ding(Shanghai Urban Construction Design and Research Institute（Group）Co.,Ltd.,Shanghai 200125,China)
出处
《佳木斯大学学报（自然科学版）》
CAS
2018年第5期672-675,692,共5页
Journal of Jiamusi University：Natural Science Edition
关键词
细砂
回弹模量
重复加载三轴试验
预估模型
fine sand
resilient modulus
repeatedload triaxial testing
prediction model
