【摘要】 不是所有的活断层都会发生强震,其中只有极少数在几十年或几百年内,有可能发生强震,这里将它们特称为“强震发生断层”。“强震发生断层”不是一个简单的面,而是有一定宽度的板状体。板状体是受了多期破裂而形成的疏松破碎的夹持层,错动时产生围限波,使强震发生断层内烈度陡增。新建的重要建筑物应避开“强震发生断层”;不能避开的,则要提高建筑物的抗震能力。台湾集集1999年7.6级地震,石冈大坝地区0.15g的抗震设防,竟能抗御0.5g的影响,不少民房坏而不倒,尚可住人值得借鉴。更多还原

【Abstract】 Not all active faults and seismogenic faults produce strong earthquake.Only few of them can produce an earthquake in tens of years.Here we specially call them as′strong earthquake-generating fault′.A strong earthquake-generating fault is not a simple plane but a slab-shaped body with a certain thickness.As the slab-shaped body has undergone multi-phase fracture,a ruptured loose inter-bed was formed.When the inter-bed is dislocated,it produces confined wave and causes strong earthquake to occur on the fault with abruptly increasing seismic intensity.Thus,important buildings must be set away from the fault.In the 1999 Jiji M7.6 earthquake in Taiwan,the Shigang Dam region designed with 0.15g could stand against the effect of 0.5g acceleration.The buildings in the region did not fall down,though they were fractured.This case is worthy to be used for reference.更多还原