At present, the common underground pipelines are steel tube, reinforced concrete pipe, and PVC hard plastic tube. The cost of them is much high and it is also difficult to lay out.
目前常用的地埋管有钢管、钢筋混凝土管、PVC硬塑料管，这些管道的成本都较高，且施工难度大。
2
The performance of reinforced concrete beam and steel tube confined concrete joint is vital to popularize steel tube confined concrete in China.
钢筋混凝土梁与钢管混凝土柱节点的受力性能是影响钢管混凝土结构应用的关键问题。
3
A constitutive model test on glass fiber reinforced polymer (GFRP) tube confined concrete was carried out.