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1986年某个时候,美国加州大学圣迭戈分校将开始对一座钢筋混凝土砖石建筑物进行缓慢的、预有准备的破坏,这是美国首次进行这种地震研究试验。其试验结果会使许多建筑物,特别是美国西部的建筑设计和建筑方法得以改进,从而将大大减少一次较大地震所造成的伤亡和财产损失。根据联邦政府的预报,一次大地震将会夺走加州南部20,000多人的生命。正在加州大学建造的这个新试验室的关键部分是一堵厚18英尺、高50英尺的混凝土墙,它被称为坚固基底(Strong-back)或反作用(reaction)的墙。科学家们将能靠近这堵墙建造一座五层高和50英尺宽的实物尺寸建筑,并通过在墙和建筑物之间放置的液压夯锤来产生人工地震力。
Sometime in 1986, the University of California, San Diego, will begin a slow, pre-planned destruction of a reinforced concrete masonry building in the United States for the first time to conduct such an earthquake study. The test results will improve the building design and construction of many buildings, especially the western United States, which will greatly reduce the casualties and property damage caused by a major earthquake. According to the federal government’s forecast, a major earthquake will take the lives of more than 20,000 people in southern California. A key part of this new laboratory being built at the University of California is a concrete wall 18 feet thick by 50 feet high called a strong-back or reaction wall. Scientists will be able to build a five-storey, 50-foot-wide physical-size building near this wall and generate artificial seismic forces through hydraulic rams placed between the wall and the building.