Stochastic analysis for bending capacity of precast prestressed concrete bridge piers using Monte-Carlo simulation and gradient boosted regression trees algorithm

Advances in Bridge Engineering

Table 1 Random characteristics of various parameters

Random variable	Meaning	Distribution	Variation
E_s	Elastic modulus of ordinary steel bars	Normal distribution	0.04
f_y	Yield strength of ordinary steel bars	Normal distribution	0.1
E_c	Elastic modulus of concrete	Normal distribution	0.3
f_co	Unconfined compressive strength of concrete	Normal distribution	0.2
E_p	Elastic modulus of prestressed steel hinge wires	Normal distribution	0.2
ε_p0	Initial strain of prestressed steel hinge wires	Normal distribution	0.2
N_g	Constant load axial force	Normal distribution	0.015