Comparison of Two Mechanics-Based Methods for Simplified Structural Analysis in Vulnerability Assessment

Table 4

Comparison of periods of vibration, displacement capacity, and collapse multipliers in DBELA and SP-BELA (in x direction).

		SP-BELA, x direction		DBELA
		(Seismically designed, 5%)
Building class	Parameter	𝑇LS3	CoV	ΔLS1	CoV
2 storeys	ΔLS2 (s)	0.86	6%	0.6	15%
	ΔLS3 (s)	1.14	9%	0.78	25%
	𝜆 (s)	1.29	10%	0.86	27%
	𝑇LS1 (m)	0.045	12%	0.034	37%
	𝑇LS2 (m)	0.078	17%	0.053	28%
	𝑇LS3 (m)	0.101	17%	0.064	28%
	ΔLS1	0.25	14%	0.38	55%
8 storeys	ΔLS2 (s)	1.18	7%	2.38	15%
	ΔLS3 (s)	1.65	10%	2.99	25%
	𝜆 (s)	1.89	10%	3.19	27%
	(𝑇/2𝜋)^2 (m)	0.13	13%	0.24	31%
	𝜉LSi (m)	0.25	19%	0.38	26%
	𝜉LSi=𝑎1+1𝜇^𝑏LSi+𝜉^el,(17) (m)	0.33	19%	0.43	26%
	𝜉el	0.37	12%	0.18	50%