OBSERVATIONS OF INSITU SOIL BEHAVIOR AND SOIL-FOUNDATION-STRUCTURE INTERACTION AT THE GEORGE E.BROWN, JR. NETWORK FOR EARTHQUAKE ENGINEERING SIMULATION (NEES) PERMANENTLY INSTRUMENTED FIELD SITES
The NEES@UCSB equipment site, focused on making field observations of ground motions, ground deformations, pore pressure response, and soil-foundation-structure interaction, has now been in operation for over three years. While the expected M6+ target event in the region of the NEES@UCSB permanent sites has not yet occurred, numerous earthquakes have been recorded which highlight the ability of the observation systems to record pore pressure increases associated with earthquakes in the magnitude 4-5 range. These observations, in the 10%g acceleration range, demonstrate the level of ground motion where onset of pore pressure increase and non-linear soil behavior starts. In addition to the interesting pore pressure and acceleration records from within the soil column, an instrumented experimental structure located at one of the NEES field sites has also recorded many of these same events and its response is analyzed. This structure is also excited regularly using a permanently mounted shaker located under the roof. Observations using this shaker provide insight into the affect of environmental conditions on structural response.
Instrumented Sites Engineering Seismology Site Response Liquefaction
J. H. Steidl R. L. Nigbor T. L. Youd
Institute for Crustal Studies, University of California, Santa Barbara, CA, USA Dept. of Civil and Environ. Engineering, University of California, Los Angeles, CA, USA Dept. of Civil and Environ. Engineering, Brigham Young University, Provo, UT, USA
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）