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: Hollow Cylindrical Piers – Retrofitted with R/C jackets

Parameters	Values
D (m)	1.5	3
t/D	0.33	0.20
ρ_l,core	0.005	0.020
ρ_w,core	0.0025	0.009
ρ_l,jacket	0.01	0.025
ρ_w,jacket	0.009	0.012
f_c,core(MPa)	20	30
f_y,core(MPa)	400	500
f_c,jacket(MPa)	30	40	45
f_y,jacket(MPa)	500
v	0.15	0.30
Combinations Number: 4608

Closed-form relationships M-phi

φ_y,RCj/φ_y,core Calculation

	β₀	β₁	β₂	β₃	β₄	β₅
φ_y,RCj/φ_y,core	0.574	0.164	0.133	-0.028	-0.103	0.261

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

φ_y,RCj/φ_y,core :

φ_u,RCj/φ_u,core Calculation

	β₀	β₁	β₂	β₃	β₄	β₅
φ_u,RCj/φ_u,core	0.083	0.252	0.03	0.118	-0.384	0.901

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

φ_u,RCj/φ_u,core :

M_y,RCj/M_y,core Calculation

	β₀	β₁	β₂	β₃	β₄	β₅
M_y,RCj/M_y,core	-3.567	4.795	0.224	-0.066	-0.097	-0.289

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

M_y,RCj/M_y,core :

M_u,RCj/M_u,core Calculation

	β₀	β₁	β₂	β₃	β₄	β₅
M_u,RCj/M_u,core	-3.45	4.649	0.21	-0.049	-0.074	-0.286

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

M_u,RCj/M_u,core :

Closed-form relationships d/h

(d_1,RCj/H)/(d_1,core/H) Calculation

	β₀	β₁	β₂	β₃	β₄	β₅
(d_1,RCj/H)/(d_1,core/H)	0.604	0.176	0.119	-0.028	-0.094	0.224

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

(d_1,RCj/H)/(d_1,core/H) :

(d_2,RCj/H)/(d_2,core/H) Calculation

	β₀	β₁	β₂	β₃	β₄	β₅
(d_2,RCj/H)/(d_2,core/H)	0.558	-0.398	0.029	0.014	0.22	0.578

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

(d_2,RCj/H)/(d_2,core/H) :

(d_3,RCj/H)/(d_3,core/H) Calculation

	β₀	β₁	β₂	β₃	β₄	β₅
(d_3,RCj/H)/(d_3,core/H)	1.291	-1.413	-0.132	0.237	0.01	1.009

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

(d_3,RCj/H)/(d_3,core/H) :

(d_4,RCj/H)/(d_4,core/H) Calculation

	β₀	β₁	β₂	β₃	β₄	β₅
(d_4,RCj/H)/(d_4,core/H)	-0.534	0.174	0.034	0.195	-0.295	1.426

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

(d_4,RCj/H)/(d_4,core/H) :