Impulsive Waves in Earthquakes Measurement and Their Influence on Structures
Extremely serious seismic damage has been inflicted on various types of structures by sharp shear forces in past large earthquakes. The conventional explanation for such damage has been that it is caused by a combination of the bending moment and the shear force generated in an earthquake. The authors deduced that almost all shear failures in structures and embankments that occurred in the 1994 Far-Off Sanriku Earthquake were caused by vertical impulsive waves and found that a considerable amount of similar damage was suffered in previous and subsequent large earthquakes. To prove their theory, they developed a series of new types of seismographs capable of detecting very high frequency waves of up to 100 Hz. The excellent resolution that these seismographs provide for high frequency waves was confirmed by drop tests conducted using steel pieces. However, in the 2008 Iwate-Miyagi Inland Earthquake, few impulsive waves with an acceleration of about 4 Gal resulted in tremendous damage to slopes and structures along mountain sides. The authors recommend the installment of more seismographs and the revision of seismic designs to withstand impulsive waves.
Impulsive wave Seismograph Shear failure Seismic design
Yukitake Shioi Tomoaki Sakai
Hachinohe Institute of Technology, Japan Applied Research Co., Ltd., Japan
国际会议
The First Anniversary of Wenchuan Earthquake(纪念汶川地震一周年国际学术会议)
成都
英文
218-225
2009-05-10（万方平台首次上网日期，不代表论文的发表时间）