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运用傅里叶幅度灵敏度检验扩展法(EFAST)对在隧道建筑模型中影响建筑物安全的各项输入指标的全局敏感性进行评价.以武汉地铁二号线越江段为案例进行分析,验证了所提方法的实用性.运用确定性和随机有限元,得到了能精确描述隧道与建筑物之间相互关系的180组数据,因为进行全局敏感性分析需要大量的数据,采用支持向量机构建代理模型,将数据扩展成了有10 000组数据的数据集,用以进行全局敏感性分析.敏感性分析有助于增加管理人员的经验知识,以方便其采用正确的措施对类似的地铁隧道临近建筑施工的风险安全进行应对管理.
The global sensitivity of each input index that affects the building safety in the tunnel building model was evaluated by using the Fourier amplitude sensitivity test extension method (EFAST). Taking the Yuejiang section of Wuhan Metro Line 2 as an example, The practicality of the method is presented.Using certainty and stochastic finite element method, 180 sets of data that can accurately describe the relationship between tunnels and buildings are obtained because of the large amount of data needed for the global sensitivity analysis and the SVM model , Expanding the data into a dataset of 10,000 sets of data for global sensitivity analysis Sensitivity analysis can help to increase managers’ experience and to use the right measures for similar subway tunnel approaching buildings The risk of construction safety management response.