Wysokowski Adam
Road, Bridge and Railway Department, Faculty of Civil Engineering, Architecture and Environmental Engineering, University of Zielona Góra, Prof. Z Szafrana St. No. 1, Building A-8, 65-417, Zielona Gora, Poland.
Sci Rep. 2022 Jan 25;12(1):1328. doi: 10.1038/s41598-022-04969-7.
The aim of the tests described in the paper was conducting a displacement and stress analysis of four buried flexible structures made in different technologies under failure load. Generally, the laboratory tests carried out on in full scale confirms that all four culvert models of the work safely despite the reduction of the backfill layer over the structures to 0.3 m (less than according to standard recommendations) and increasing the load to 1960 -2000 kN (almost 4 times more than according to standards and recommendations). In the case of a PE plastic pipe, the main measured parameter was displacement and for other steel research models it was the stress. The obtained maximum values of these parameters were compared with the permissible standard values. Maximum displacement values were recorded in the crowns of the structures up to 12.57 mm for PE plastic pipe model. The maximum stresses for steel structures were 85.28 MPa (for corrugated steel pipe), 111.5 MPa (Box Culvert) and 447.9 MPa (Multi Plate non-circular structure). Despite the exceed stress in the case of Multi Plate structure, the steel structure did not lose its stability. The analyses carried out were aimed at determining database, which in its assumption, allows the verification of calculations performed by a numerical method such as FEM.
本文所述测试的目的是对四种采用不同技术制造的埋地柔性结构在破坏荷载作用下进行位移和应力分析。总体而言，在全尺寸条件下进行的实验室测试证实，尽管结构上方的回填层厚度减至0.3米（低于标准建议值）且荷载增加至1960 - 2000千牛（几乎是标准和建议值的4倍），该工程的所有四个涵洞模型仍安全。对于PE塑料管，主要测量参数是位移；对于其他钢质研究模型，主要测量参数是应力。将这些参数的实测最大值与标准允许值进行了比较。PE塑料管模型在结构拱顶处记录到的最大位移值达12.57毫米。钢结构的最大应力分别为85.28兆帕（波纹管）、111.5兆帕（箱涵）和447.9兆帕（多板非圆形结构）。尽管多板结构出现了应力超标情况，但钢结构并未失去稳定性。所进行的分析旨在确定数据库，该数据库在其假设条件下可用于验证诸如有限元法等数值方法所进行的计算。
