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首页> 外文会议>Geotechnical Engineering in the Information Technology Age >Incorporation of Terrain Elevation Uncertainties in Vulnerability Assessment of Tunnel Facilities
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Incorporation of Terrain Elevation Uncertainties in Vulnerability Assessment of Tunnel Facilities

机译：将地形高程不确定性纳入隧道设施的脆弱性评估中

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摘要

Digital terrain elevation data (DTED) supports realistic simulation and visualization of underground structures. However, simulations related to public safety (such as vulnerability assessment of tunnel facilities) must account for uncertainty in the DTED data. The terrain elevation uncertainty is typically quantified by the data provider, and depends on measurement parameters including post spacing. It can be time-prohibitive to perform a probabilistic assessment of a complex tunnel facility that includes DTED data, due to the computational expense of generating multiple solid models that account for sampled terrain elevation. A simplified mathematical approach is presented to account for terrain elevation uncertainties in the analysis of weapons effects against tunnels. Engineering models for the prediction of weapon impact, rock penetration, and cratering are modified to account for uncertainty in terrain elevation data. The influence of terrain elevation uncertainties is demonstrated by simulating an explosive event against a highway tunnel. The predicted outcome (including expected rubble volume and probability of catastrophic collapse) is compared over a range of terrain elevation uncertainty from ±0 (no uncertainty) to ±5 ft.
机译：数字地形高程数据（DTED）支持地下结构的真实模拟和可视化。但是，与公共安全相关的模拟（例如隧道设施的脆弱性评估）必须考虑DTED数据中的不确定性。地形高程不确定性通常由数据提供者量化，并取决于包括桩间距的测量参数。对包含DTED数据的复杂隧道设施进行概率评估可能会很费时，这是因为生成用于解释采样地形标高的多个实体模型的计算量很大。在分析武器对隧道的影响时，提出了一种简化的数学方法来解决地形高程的不确定性。修改了用于预测武器撞击，岩石穿透和弹坑的工程模型，以解决地形标高数据的不确定性。通过模拟公路隧道的爆炸事件，可以证明地形高程不确定性的影响。在从±0（无不确定性）到±5 ft的地形高程不确定性范围内，比较了预期的结果（包括预期的瓦砾量和灾难性倒塌的可能性）。

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