On the correlation of the components of strong ground motion—Part 2

1981 ◽  
Vol 71 (4) ◽  
pp. 1323-1331
Author(s):  
A. H. Hadjian
Keyword(s):  
Correlation Coefficient ◽  
Ground Motion ◽  
Seismic Design ◽  
Strong Ground Motion ◽  
Statistical Data ◽  
Correlation Coefficients ◽  
Design Codes ◽  
Simple Description ◽  
Rectangular Distribution ◽  
Strong Ground

abstract The correlation coefficient of the two horizontal components of strong ground motion is studied as an aid in specifying characteristics of synthetically generated motions to be used simultaneously in the dynamic response of structures. The recorded available data is “extended” by recognizing certain properties of the components of ground motion such that the statistical data used includes all possibilities of the orientation of recording accelerographs. The probability density function of the correlation coefficients is derived numerically, which could be used for further studies of the characteristics of ground motion. From this distribution, an approximate yet simple description of the correlation coefficient of the components of ground motion is derived for use in seismic design codes: it is shown that the value of the correlation coefficient of the components of ground motion can be approximated by a rectangular distribution ranging from −0.32 to 0.32. For all practical purposes the correlation coefficient varies from −0.5 to +0.5.

Seismic Design Guidelines to Mitigate Upheaval Buckling of Small Diameter Pipes

2012 ◽  
Author(s):  
Hajime Shinkai ◽  
Yoshito Hatsuda ◽  
Nobuhisa Suzuki
Keyword(s):  
High Pressure ◽  
Ground Motion ◽  
Seismic Design ◽  
Research Program ◽  
Strong Ground Motion ◽  
Small Diameter ◽  
Design Guidelines ◽  
Upheaval Buckling ◽  
Offshore Earthquake ◽  
Strong Ground

This paper describes The Draft Seismic Design Guidelines to Mitigate Upheaval Buckling of Small Diameter Pipes which were reported by Ministry of Economy, Trade and Industry in 2011. Upheaval buckling of small diameter gas pipes occurred in a high-pressure gas pipeline and three middle-pressure city lines due to the strong ground motion during the 2007 Niigata Chuetsu Offshore earthquake which was a powerful earthquake with moment magnitude of 6.6. A three year research program had been conducted since 2008 to investigate the upheaval buckling behaviors and develop seismic design guidelines to ensure seismic integrity of small diameter high-pressure gas pipelines and middle-pressure main distribution lines.

scholarly journals Experimental investigation of strong ground motion due to thrust fault earthquakes

2014 ◽  
Vol 119 (2) ◽  
pp. 1316-1336 ◽  
Author(s):  
Vahe Gabuchian ◽  
Ares J. Rosakis ◽  
Nadia Lapusta ◽  
David D. Oglesby
Keyword(s):  
Experimental Investigation ◽  
Ground Motion ◽  
Strong Ground Motion ◽  
Thrust Fault ◽  
Strong Ground
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