Shaking Table Test of a Full-Scale RC Frame Structure with an Indoor Gas Piping System

Table 5

Natural frequency and fundamental period of the model.

White noise loading sequence	Test conditions	Period (s)	Frequency (Hz)	Frequency reduction factor
First	Before the trial	0.256	3.906	1
second	After 0.07 g	0.267	3.748	0.96
Third	After 0.2 g	0.283	3.528	0.90
Fourth	After 0.4 g	0.339	2.954	0.76
Fifth	After 0.62 g	0.683	1.465	0.38