一、铁路建筑物因地震遭受的损坏 日本国营铁路线路总长21,000公里。约有80％是在1870～1925年间修建的,其余是在1925年以后建设的。铁路建筑物的平均使用年数至今约为50年。有些建筑物的抗震能力已经减退。在这些建筑物中安装了地震仪并与警报信号相联动,以便在发生强烈震动时停驶列车。 I. Damage to Railway Buildings Caused by the Earthquake Japan’s state-owned railway lines have a total length of 21,000 kilometers. About 80% were built between 1870 and 1925 and the rest were built after 1925. The average useful life of railway structures is about 50 years. The seismic capacity of some buildings has diminished. Seismographs were installed in these buildings and linked with warning signs to stop the train in the event of a strong shock.