泥石流危害桥隧工程易损性评价

发布时间：2018-05-21 19:15

  本文选题：泥石流 + 工程易损性　； 参考：《岩土力学》2014年09期

【摘要】：为将泥石流灾害损失评价由宏观价值评判提升至可为工程服务,曾提出了基于结构损毁程度评判的工程易损性概念。然而,诸如桥隧工程在遭受泥石流危害时,仅靠结构损毁程度无法正确判定实际灾情,会导致对功能完全损失而结构受损较轻的受灾工况"轻"判、功能尚可而结构损毁较重的受灾工况"重"判。鉴于此,在原有结构损毁程度评判的基础上,通过增加承灾特征、线路规格、恢复成本等桥隧工程使用功能的影响因素,形成了既关注"结构损毁",又重视"功能损失"的泥石流危害桥隧工程易损性评价方法。实例分析表明,该方法克服了单一结构评判的不足,与现场灾情更为相符。这丰富并发展了工程易损性评价的内涵,使评价结果更为全面、合理,对正确预判或验证桥隧工程遭受泥石流危害受灾情况,合理妥善地准备或及时准确地启动应急预案,具有重要意义。
[Abstract]:In order to improve the evaluation of debris flow disaster loss from macroscopic value evaluation to engineering service, the concept of engineering vulnerability based on structural damage degree evaluation was put forward. However, for example, when bridge and tunnel engineering is damaged by debris flow, it can not correctly judge the actual disaster situation by merely relying on the degree of structural damage, which will lead to the "light" judgment of the disaster condition in which the function is completely lost and the structure is less damaged. Function and structure damage more serious disaster conditions, "heavy" judgment. In view of this, on the basis of the evaluation of the damage degree of the original structure, by increasing the disaster bearing characteristics, line specifications, restoration cost and other factors affecting the use of bridge and tunnel engineering functions, A method to evaluate the vulnerability of debris flow to bridge and tunnel works is formed, which not only pays attention to "structural damage" but also "function loss". The analysis of examples shows that the method overcomes the shortage of single structure evaluation and is more consistent with the disaster situation in the field. This enriches and develops the connotation of engineering vulnerability evaluation, and makes the evaluation results more comprehensive and reasonable. In order to correctly predict or verify the damage of bridge and tunnel projects affected by debris flow, the emergency plans can be properly prepared or started in time and accurately. It is of great significance.
【作者单位】： 中南大学土木工程学院;
【基金】：国家自然科学基金(No.41272376) 铁道部专项项目(No.2011G017-C) 西部交通建设科技项目(No.200831800087)
【分类号】：P642.23;U445.7;U457
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本文编号：1920414