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当前,国外一些地震工程研究者,在表征地震对结构物的作用和预测地震危险性两个方面,已经用定量的方法统一起来了。美国从1974年率先研究,于1977年春提出抗震设计新规范并给出“有效峰值加速度”的等值线图和“有效峰值速度”的等值线图,描述在今后一定时期内各地区可能遭受到的地震作用的量值。这种摒弃了宏观所表示的烈度概念为直接以某些定量的量值来进行地震危险性区划的办法,国际上公认较前进了一大步。据此,国外许多国家的建筑研究部门都在研究一种新的建筑物抗震技术——避震装置,以避免或减轻地震威胁。最近几年来,避震建筑物已陆续建成。以前,能反映实际情况的抗震设计原理都是指
At present, some earthquake engineering researchers in foreign countries have unified the use of quantitative methods in characterizing the effects of earthquakes on structures and in predicting seismic hazards. The United States took the lead in research from 1974 and proposed a new seismic design specification in the spring of 1977. It also gave a contour map of “effective peak acceleration” and a contour map of “effective peak speed”, describing that each region may suffer in the coming period. The magnitude of the earthquake action. This method of abandoning the macroscopically expressed intensity is a method of directly carrying out seismic hazard zoning with certain quantitative values. It is recognized internationally as a major step forward. Accordingly, the construction research departments of many foreign countries are researching a new type of building seismic technology—a shock absorber to avoid or reduce the threat of earthquakes. In recent years, shock-absorbing buildings have been built one after another. In the past, seismic design principles that can reflect actual conditions all refer to