Damage and vibrations of nuclear power plant buildings subjected to aircraft crash part I: Model test
Damage and vibrations of nuclear power plant buildings subjected to aircraft crash part I: Model test
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飞机失事核电厂厂房的损伤与振动第一部分：模型试验
DOI：
10.1016/j.net.2021.03.009
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发表时间：
2021-03
影响因子：
2.7
通讯作者：
H Wu
中科院分区：
文献类型：
--
作者：
Z R Li;Z C Li;Z F Dong;T Huang;Y G Lu;J L Rong;H Wu
大型商用飞机对核电站建筑物的撞击效应研究受到了广泛关注，特别是在9/11事件后。本文第一部分进行了两组飞机撞击核电厂厂房的缩尺模型试验。首先，设计并制备了1：15飞机模型（重135 kg）和RC核电厂模型（重约70 t）。然后，基于大型火箭橇加载试验平台，将飞机模型加速至垂直撞击核电站模型两侧，即，安全壳和辅助建筑，速度约为170 m/s。利用预先布置的21个应变片和20个三轴加速度计，得到了核电厂模型撞击区钢筋的应变时程和各层的加速度时程，并用3台高速摄像机记录了撞击全过程。在安全壳和辅助厂房碰撞的情况下，分别出现了局部贯穿和穿孔两种破坏模式，并对核电厂的设计提出了建议。1：15比例试验的最大加速度为1785.73 g，因此原型撞击的相应最大合成加速度可能约为119 g，这对核设备构成潜在威胁。此外，还发现振动沿高度沿着的非线性衰减很好地反映在最大合成振动和累积绝对速度（CAV）的变化。首先介绍了核电厂结构在飞机撞击下的损伤和动态响应的试验研究工作，为核电厂原型结构以及内部系统和部件的抗飞机撞击安全性评估提供了基准依据。
Investigations of large commercial aircraft impact effect on nuclear power plant (NPP) buildings have been drawing extensive attentions, particularly after the 9/11 event, and this paper aims to experimentally assess the damage and vibrations of NPP buildings subjected to aircraft crash. In present Part I, two shots of reduce-scaled model test of aircraft impacting on NPP building were carried out. Firstly, the 1:15 aircraft model (weighs 135 kg) and RC NPP model (weighs about 70 t) are designed and prepared. Then, based on the large rocket sled loading test platform, the aircraft models were accelerated to impact perpendicularly on the two sides of NPP model, i.e., containment and auxiliary buildings, with a velocity of about 170 m/s. The strain-time histories of rebars within the impact area and acceleration-time histories of each floor of NPP model are derived from the pre-arranged twenty-one strain gauges and twenty tri-axial accelerometers, and the whole impact processes were recorded by three high-speed cameras. The local penetration and perforation failure modes occurred respectively in the collision scenarios of containment and auxiliary buildings, and some suggestions for the NPP design are given. The maximum acceleration in the 1:15 scaled tests is 1785.73 g, and thus the corresponding maximum resultant acceleration in a prototype impact might be about 119 g, which poses a potential threat to the nuclear equipment. Furthermore, it was found that the nonlinear decrease of vibrations along the height was well reflected by the variations of both the maximum resultant vibrations and Cumulative Absolute Velocity (CAV). The present experimental work on the damage and dynamic responses of NPP structure under aircraft impact is firstly presented, which could provide a benchmark basis for further safety assessments of prototype NPP structure as well as inner systems and components against aircraft crash.
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