Under DevelopmentPlease cite this work as:Stefanidou, S., Paraskevopoulos, E., Papanikolaou, V., Kappos, A.J. "An online platform for bridge-specific fragility analysis of as-built and retrofitted bridges", Bulletin of Earthquake Engineering, 20, 1717-1737 (2022). https://doi.org/10.1007/s10518-021-01299-3

The Bridge Database - ESPA

Closed form relationships: Cylindrical Piers

Parameters	Values
ρ_l	0.005	0.01	0.015	0.02	0.025	0.030
ρ_w	0.0025	0.008	0.010	0.015
D (m)	1.5	1.6	1.8	2	2.25
f_c (MPa)	16	20	25	30	35
f_y (MPa)	220	400	500
v	0.15	0.2	0.25	0.5
Combinations Number: 7200

Closed-form relationships M-phi

φ_y Calculation

	β₀	β₁	β₂	β₃	β₄
φ_y	-5.715	-0.734	-0.017	0.309	0.089

Please fill in the following parameters and press "Calculate".

φ_y :

φ_u Calculation

	β₀	β₁	β₂	β₃	β₄
φ_u	-2.331	-0.602	-0.582	-0.049	0.602

Please fill in the following parameters and press "Calculate".

φ_u :

M_y Calculation

	β₀	β₁	β₂	β₃	β₄
M_y	-0.369	0.633	0.225	0.551	0.053

Please fill in the following parameters and press "Calculate".

M_y :

M_u Calculation

	β₀	β₁	β₂	β₃	β₄
M_u	-0.269	-0.645	0.217	0.559	0.054

Please fill in the following parameters and press "Calculate".

M_u :

Closed-form relationships d/h

d₁/H Calculation

	β₀	β₁	β₂	β₃	β₄	β₅
d₁/H	-6.524	-0.876	-0.018	-0.688	0.086	0.292

Please fill in the following parameters and press "Calculate".

d₁/H :

d₁ :

d₂/H Calculation

	β₀	β₁	β₂	β₃	β₄	β₅
d₂/H	-6.016	-0.674	-0.265	-0.076	0.03	-0.072

Please fill in the following parameters and press "Calculate".

d₂/H :

d₂ :

d₃/H Calculation

	β₀	β₁	β₂	β₃	β₄	β₅
d₃/H	-3.872	-0.572	-0.238	-0.47	0.505	-0.108

Please fill in the following parameters and press "Calculate".

d₃/H :

d₃ :

d₄/H Calculation

	β₀	β₁	β₂	β₃	β₄	β₅
d₄/H	-3.663	-0.542	-0.381	-0.518	0.439	0.001

Please fill in the following parameters and press "Calculate".

d₄/H :

d₄ :