【摘要】 地震灾害场景仿真是提高城市综合抗震防灾能力的重要手段,建筑震害高真实感的可视化是地震灾害场景仿真的重要内容。为提高城市区域建筑群震害模拟结果的可视化效果,研究采用易于获取的城市3D多边形模型,开发了建筑对象识别算法和楼面外形生成算法,实现了建筑外形数据自动获取;提出建筑位移插值和建筑外形网格重划分处理方法,实现了建筑群震害的高真实感可视化;并将该方法运用于北京CBD建筑群的震害结果高真实感可视化,该可视化的结果显著优于常规的2.5D可视化方法。文中的成果可为地震灾害场景仿真研究提供参考。更多还原

【Abstract】 Earthquake disaster scenario simulation is a useful tool to improve the comprehensive capability of urban disaster prevention,and in earthquake disaster scenario simulation,high-fidelity seismic damage visualization of buildings is an important topic.To improve the urban seismic damage visualization of buildings,the easy accessible 3D urban polygonal model is adopted.Powered by the building identification method and floor plan generation method,building geometric data can be acquired automatically.Meanwhile,building displacement interpolation and building remeshing methods are also developed so as to realize high-fidelity seismic damage visualization; furthermore,the methods are used to visualize the seismic results of buildings in the Central Business District(CBD) of Beijing,and the 3D visualization method is significantly more realistic than the existing 2.5D visualization method.The outcome of this research will provide a technical reference for improving emergency preparedness and mitigating possible earthquakeinduced losses for high seismic regions and cities.更多还原