Structural response and failure mode of steel tanks under impact loading

被引：0
|
作者：
Zhu D. [1 ]
Wang Z. [2 ]
Liang M. [1 ]
Zhao Y. [1 ,3 ]
机构：
[1] Space Structures Research Center, Zhejiang University, Hangzhou
[2] School of Engineering, Hangzhou City University, Hangzhou
[3] School of Civil Engineering, Shaoxing University, Shaoxing
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2023年 / 44卷
关键词：
dynamic response; failure mode; finite element analysis; impact loading; plastic hinge line; steel tank;
D O I：
10.14006/j.jzjgxb.2023.S1.0036
中图分类号：
学科分类号：
摘要：
In order to study the structural response and failure mode of large vertical steel storage tanks subjected to accidental impact loading, the finite element model of the shell considering collision-contact under impact was established and the response process of a typical steel tank under impact was analyzed, including the deformation mode, strain distribution and plastic hinge line. Then the deformation distribution and energy change of steel tank under different impactor velocities, tank radius-to-thickness ratios and tank height-to-radius ratios were analyzed. Based on the results of parametric analysis, three types of failure modes for steel tanks and the change rules were discussed. The results show that the main deformation region of the steel tank under impact is approximately triangular, which can be divided into three small triangles with the impact point as the center, and part of the outer boundaries appear positive and negative plastic hinge lines. The maximum residual deformation and average impact force of the tank increase linearly with the increase of impactor impulse, and decrease with the increase of height-to-radius ratio. When the radius-to-thickness ratio increases with constant tank radius, the maximum residual deformation of the tank wall increases while the energy absorption capacity decreases. When the radius-to-thickness ratio increases with constant tank thickness, both of them have little change. With the increase of the mass and velocity of the impactor, the local failure, whole failure mode and rupture failure mode of the tank appear successively under the impact, and the local failure is the most common. For the whole failure mode, the deformation region is relatively large and the end constraint is weakened leading to the loss of the whole bearing capacity. For the rupture failure mode, the tank wall at the impact has reached the failure strain before dissipating enough energy through deformation diffusion. © 2023 Science Press. All rights reserved.
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页码：317 / 326
页数：9
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