考虑交通阻滞的区域建筑震后功能恢复能力评估

地震作用下基础设施工程的损毁将造成所在区域功能瘫痪，对其功能恢复能力进行准确评估可为救援和重建工作提供重要参考。震后区域建筑功能恢复不仅与建筑物倒塌有关，还依赖于交通系统的阻滞程度，以往针对建筑功能恢复能力评估多集中于量化建筑自身构件的震毁状态和维修费用，尚未考虑交通系统功能修复的影响。该文提出一种可考虑交通阻滞的区域建筑震后功能恢复能力评估方法。通过定义功能损失比，提出建筑震后残余功能计算方法；基于交通链路功能重要度指标，建立同时考虑建筑物破坏和地震次生灾害双因素影响的交通阻滞分析模型。结合交通阻塞度和建筑残余功能定义单体建筑功能恢复时间计算方法，并依据水平串联型恢复路径，建立考虑交通系统功能耦联的区域建筑功能恢复能力评估体系。以某村镇为例进行区域建筑的震后功能恢复能力评估，分析表明文中方法能全面考虑交通功能对区域建筑恢复的影响，结果更为合理、准确。

Evaluation of functional recovery ability of regional buildings after earthquake considering traffic block

Destruction of the infrastructures under the earthquake may cause regional dysfunction, and accurate assessment on its functional recovery ability can provide important reference for reconstruction work. The functional restoration of regional building is not only related to the damaged state of buildings, but also depends on the degree of traffic system retardation. Previous studies have focused on quantifying the damaged state and maintenance cost of building components, but have not considered the impact of the traffic system. An assessment method of functional recovery capability considering traffic block for regional buildings is proposed. Furthermore, a method for assessing residual function of buildings after earthquake is put forward by defining a functional loss ratio. Based on the function importance index of traffic links, a traffic block analysis model is established which considered the combined effects of building damage and earthquake secondary disasters. The function recovery time of single building is calculated by combining the traffic congestion degree and the building residual function. According to the horizontal recovery path in series, the functional recovery ability evaluation system of regional building considering the traffic block is established. With a village taken as an example, the proposed method is verified, and the analysis shows that the proposed method can fully consider the influence of traffic function on the regional building recovery, so that its results are more reasonable and accurate.