近场强震作用下城市桥梁结构灾害评价方法研究

发布时间：2019-07-23 19:13

【摘要】：桥梁是城市交通系统中抗震性能最差的节点,一旦遭受地震破坏会影响城市生存功能,可能导致城市局部或整体功能瘫痪,引发或加重次生灾害,降低了地震应急救援和震后恢复的速度和效果,是都市区震害情景构建中重点考虑的关键环节。根据唐山、海城、汶川地震等桥梁震害资料,对桥梁按场地土类型、建筑年代等分类,建立桥梁易损性曲线模型,并提出了适用于城市大量桥梁地震灾害状态快速评价方法,利用该方法评价了潜在近场强地震动作用下太原市区环城高速以内主干道路桥梁的震害。与以往的桥梁易损性模型对比结果表明,所提出的桥梁易损性模型可以更加准确地评价桥梁的震害。该方法可为城市桥梁的震前改造加固、震后快速恢复提供理论依据,也可为震后应急救援决策提供必要的支持。
[Abstract]:Bridge is the worst seismic node in urban traffic system. Once damaged by earthquake, it will affect the survival function of the city, which may lead to the paralysis of the local or overall function of the city, cause or aggravate the secondary disasters, reduce the speed and effect of earthquake emergency rescue and post-earthquake recovery, and is the key link in the construction of earthquake damage scenarios in metropolitan areas. Based on the earthquake damage data of bridges such as Tangshan, Haicheng and Wenchuan earthquakes, the vulnerability curve model of bridges is established according to the classification of site soil type and building age, and a rapid evaluation method suitable for earthquake disaster state of a large number of bridges in the city is put forward, and the earthquake damage of the main roads and bridges within the expressway in Taiyuan city under the action of potential near-field strong ground motion is evaluated by using this method. Compared with the previous bridge vulnerability model, the proposed bridge vulnerability model can evaluate the seismic damage of the bridge more accurately. This method can provide theoretical basis for urban bridge reconstruction and reinforcement before earthquake and rapid recovery after earthquake, and can also provide necessary support for emergency rescue decision after earthquake.
【作者单位】：中国地震局地球物理研究所;北京工业大学建筑与土木工程学院;中国地震局工程力学研究所;
【基金】：中国地震局地球物理研究所基本科研专项(DQJB14C05) 国家自然科学基金(51578514,U1434210)~~
【分类号】：P315.9;U445.75

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