| 基于空间特性的台风风灾害评估EI北大核心CSCD |
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| 引用本文： | 任贺贺,柯世堂,杨杰.基于空间特性的台风风灾害评估EI北大核心CSCD[J].工程力学,2022,39(12):212-221. |
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| 作者姓名： | 任贺贺 柯世堂 杨杰 |
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| 作者单位： | 南京航空航天大学土木与机场工程系，南京 210016 |
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| 基金项目： | 国家重点研发计划项目(2019YFB1503701)；国家自然科学基金项目(52108456，52078251)；江苏省自然科学基金项目(BK20211518，BK20210309)；中央高校基本科研业务费专项资金项目(NS2021050，NE2020007) |
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| 摘 要： | 针对仅考虑强度相关单因素的风灾害评估方法不能准确表征台风风灾害程度问题,该文依据三种不同沿海基础设施抗风等级对应的风灾害指标因子公式,通过开展基于面积积分风灾害评估方法研究台风空间特性对灾害评估的重要性。网格分辨率影响风灾害评估指标因子,分辨率越高,该指标因子越高;海表温度也是风灾害评估指标因子的影响因素,海表温度越高,该指标因子越高;且分辨率约为200 m甚至500 m时可准确表征台风风灾害。研究表明:基于面积积分风灾害评估方法相较传统单因素评估方法能够更准确表征台风风灾害程度;但外围小风速对风灾害评估影响较大,SST-27、SST-28和SST-29风灾害程度最高约为65%,SST-26最高约为90%。因此,针对风速小但尺寸大和风速大但尺寸小台风风灾害评估问题,引用切入风速概念后,小风速对风灾害评估影响显著降低,SST-27、SST-28和SST-29风灾害程度最高约为13%,SST-26最高约为3%,解决了小风速区间占比过大但对结构损伤无作用问题。
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| 关 键 词： | 台风风灾害 空间特性 风灾害指标 面积积分 切入风速 |
| 收稿时间： | 2021-08-11 |
TYPHOON WIND DISASTER ASSESSMENT BASED ON SPATIAL CHARACTERISTICS |
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| Affiliation: | Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | In view of the problem that the wind disaster assessment method considers only the intensity-related single factor and cannot accurately characterize the degree of typhoon wind disaster, this paper studies the importance of typhoon spatial characteristics to disaster assessment by assessing wind disaster based on area integral according to the wind disaster index corresponding to three different wind resistance levels of coastal infrastructures. Grid resolution affects wind disaster assessment index, i.e., the finer the grid-scale, the higher the index; the sea surface temperature (SST) is also an effect factor of the index, and the higher the SST, the higher the index; the typhoon wind disaster can be accurately characterized when the resolution is about 200 m or even 500 m. The results show that the area integral method can more accurately characterize the typhoon wind disaster than the traditional single factor assessment method. However, the small wind speed in the outer region has a great impact on the wind disaster. As the highest proportion of SST-27 to SST-29 is up to 65%, SST-26 is up to 90%. Therefore, for typhoon wind disasters with small wind speed - large size and large wind speed - small size, the impact of small wind speed on wind disaster assessment is significantly reduced after the introduction of the concept of cut-in wind speed. The highest proportion of SST-27 to SST-29 is 13%, the highest proportion of SST-26 is 3%. The problem, that small wind speed has large proportion range but no effect on structural damage, is solved. |
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