SHAKING TABLE TESTS TO ELUCIDATE LIQUEFACTION BEHAVIOR OF RECLAIMED LANDS OF WEATHERED GRANITE DURING THE 1995 HYOGO-KEN-NANBU EARTHQUAKE

Abstract

Liquefaction occurred in most of reclaimed lands in Hanshin area during the Hyogo-Ken-Nanbu Earthquake, January 17, 1995. Such lands are made of weathered granite, “Masa-do”, which has been believed anti-liquefiable. Authors carried out many cases of shaking table tests to model ground set up in shear container with erupted “Mass-do” under horizontal and vertical excitation. Objectives of the experiments are to simulate the actual behavior of reclaimed lands for the following issues; (1) liquefaction and settlement characteristics, (2) influence of vertical excitation, (3) ground motion amplification, and finally to evaluate the ground motion in both aspects of liquefaction and seismic design code. The test results can elucidate an outline of the actual liquefaction behavior.