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 FRP jackets

Parameters	Values
D (m)	1.5	3
t/D	0.33	0.20
t_FRP(mm)	0.3	0.5	0.8
ρ_l,core	0.005	0.020
ρ_w,core	0.0025	0.009
f_c,core(MPa)	20	30
f_y,core(MPa)	400	500
E_j(MPa)	225000	75000
F_j(MPa)	4150	2450
n	1	3	5
v	0.15	0.30
Combinations Number: 2304

Closed-form relationships M-phi

φ_y,FRPj/φ_y,core Calculation

	β₀	β₁	β₂	β₃	β₄
φ_y,FRPj/φ_y,core	-226.6	227.7	0.0228	0.00197	-0.146

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

φ_y,FRPj/φ_y,core :

φ_u,FRPj/φ_u,core Calculation

	β₀	β₁	β₂	β₃	β₄
φ_u,FRPj/φ_u,core	-282.6	283.7	-0.132	0.0162	0.00867

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

φ_u,FRPj/φ_u,core :

M_y,FRPj/M_y,core Calculation

	β₀	β₁	β₂	β₃	β₄
M_y,FRPj/M_y,core	-55.2	56.2	0.0224	-0.00144	-0.0388

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

M_y,FRPj/M_y,core :

M_u,FRPj/M_u,core Calculation

	β₀	β₁	β₂	β₃	β₄
M_u,FRPj/M_u,core	-39.1	40.1	0.0236	-0.00151	-0.0154

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

M_u,FRPj/M_u,core :

Closed-form relationships d/h

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

	β₀	β₁	β₂	β₃	β₄
(d_1,FRPj/H)/(d_1,core/H)	-208.2	209.3	0.0175	0.00205	-0.134

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

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

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

	β₀	β₁	β₂	β₃	β₄
(d_2,FRPj/H)/(d_2,core/H)	-29.67	30.71	-0.0113	0.00162	-0.0305

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

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

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

	β₀	β₁	β₂	β₃	β₄
(d_3,FRPj/H)/(d_3,core/H)	101.4	-100.7	-0.201	0.0203	-0.548

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

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

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

	β₀	β₁	β₂	β₃	β₄
(d_4,FRPj/H)/(d_4,core/H)	-73.78	74.66	-0.159	0.0188	0.258

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

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