Recorded seismic response of the Samoa Channel Bridge-foundation system and adjacent downhole array

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• 作者：Ning Wang^a ; ^{ningwang@cea-igp.ac.cn} ; Ahmed Elgamal^b ; ^{elgamal@ucsd.edu} ; Thomas Shantz^c ; ^{tom_shantz@dot.ca.gov}
• 关键词：Highway bridge ; Earthquake response ; Soil-structure interaction ; SSI ; Seismic response
• 刊名：Soil Dynamics and Earthquake Engineering
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：92
• 期：Complete
• 页码：358-376
• 全文大小：5438 K
• 卷排序：92

文摘

During six seismic events, over 30 channels have documented response of the bridge, abutments, and adjacent ground surface. Of special interest is the response of a bridge pier with records at the deck, pile cap and underlying pile foundation. Response of this pile foundation is compared to that of the ground at the nearby Eureka geotechnical downhole array. Records from the 2010 earthquake (PGA of about 0.16 g), along with other low-amplitude events (2007–2014) are studied. On the basis of the recorded motions, the ground, pile foundation, and overall bridge seismic response are evaluated. Spatial variation of the recorded motions is examined. During the strongest shaking phase, stiffness reduction was observed in the instrumented pier column and foundation.