地震活动对城市造成的危害。城市因人口、工程设施、财产高度密集，经济发达，所以地震灾害的直接损失、间接损失特别严重，是防震减灾的重点。城市地震灾害的大小主要取决于地震强度以及地震震中与城市的距离，同时与城市规模和防震抗灾能力有密切关系。
城市地震灾害综合防御 comprehensive prevention of urban earthquake
历史震害表明，建筑物的破坏是城市地震灾害中最主要的形式。
The historical earthquake damage indicated that the destruction of buildings is the main destruction form in the earthquake in a city.
论述了在城市地震灾害中如何考虑诸方面因素来评价城市的灾害轻重分布情况。
How to estimate the distribution of urban earthquake disaster with various elements is introduced in the paper.
最后设计了城市地震灾害风险评价流程，并给出了城市地震灾害风险区划算法。
At last, the flowchart of risk assessment of urban earthquake disaster is designed, and zonation arithmetic of risk region is showed.
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