High Dimension Model Representation-Based Response Surface for Reliability Analysis of Tunnel

Table 2

Reliability comparison of displacement in different support pressures.

pi(Mpa)	HDMR				FORM
	Reliability index	Design point			Reliability index	Design point
		E/MPa	c/MPa	φ/°		E/MPa	c/MPa	φ/°
0.6	0.1457	367.3984	0.2249	22.8493	0.1461	367.3551	0.2252	22.8399
0.8	1.9802	285.8693	0.1879	22.6957	1.9807	286.0296	0.1879	22.6818
1.0	3.3316	215.5761	0.2018	22.6527	3.3315	215.7354	0.2003	22.6645
1.2	4.2080	171.0550	0.2257	22.8258	4.2067	171.2994	0.2210	22.7729