MEASUREMENTS OF DYNAMIC CHARACTERISTICS OF SIX HIGH-RISE BUILDINGS ON SOFT FOUNDATIONS

The dynamic behaviors of 6 high-rise buildings in Wenzhou urban district are investigated by means of field vibration test. The structural natural vibration period is obtained to analyze the relationship between the fundamental period and the height and the floor number of high-rise buildings on soft foundation. Some difference is observed in earthquake-resistant performance between the tall buildings built in early 1990s and those after 2000s. Morover, the tall buildings in Wenzhou urban district on soft foundation may undergo resonant reactions under far-fault strong earthquakes。