Probabilistic Safety Factor Calculation of the Lateral Overturning Stability of a Single-Column Pier Curved Bridge under Asymmetric Eccentric Load

Abstract

At present, the calculation methods for the lateral overturning stability safety factor of a single-column pier curved bridge under asymmetric eccentric load in the highway bridge code adopt deterministic calculation models. This paper presents a transverse overturning stability safety factor study of single-column pier curved bridges under asymmetric eccentric load based on inverse reliability theory. This method, which both considers the influence of uncertainty factors among the structural parameters and satisfies the prescribed reliability level, was used to obtain safety factors through a target reliability index. Transverse overturning stability factors of single-column pier curved bridges under asymmetric eccentric load were estimated using the proposed method. A new method was proposed to calculate the design parameter of the safety factor of single-pier instability, and then an application was carried out. The results show that parameter uncertainty has a major effect on transverse overturning stability safety factors of single-column pier curved bridges under asymmetric eccentric load. Ignoring parameter uncertainty will produce an overestimation of the transverse overturning stability safety factors of single-column pier bridges. The vehicle load must be strictly controlled to avoid transverse overturning due to overloading. Compared to the deterministic model, the proposed method has the advantages of calculating the safety factors considering the randomness of parameters and establishing the relationship of the safety factor with the target reliability index.

Experimental and Numerical Investigation of the Anti-Overturning Theory of Single-Column Pier Bridges

“…Under the action of bridge gravity, the reaction force of each bearing is shown in Table 4. The vehicle load is consistent with the vehicle used in the field test [18,25], and the detailed data of the vehicle are shown in Table 2. Working Conditions 1-3 represent singlevehicle loading, double-vehicle loading, and three-vehicle loading, respectively, and the loading positions of the different working conditions are shown in Figure 6.…”

“…Dong F.H. et al [18] proposed a calculation method for the safety factor of lateral overturning stability based on reliability theory for curved bridges with single-pillar piers under asymmetric eccentric loads and established a calculation method from the target reliability index to the safety factor of the lateral overturning stability. Ge L.F. et al [19] proposed the method of early warning and situation feedback for sudden bridge collapse with the help of WIMs and added an overturning risk calculation model from the perspective of preventing the overturning of single-pier bridges.…”

Error Influence Simulation of the 500 m Aperture Spherical Radio Telescope Cable-Net Structure Based on Random Combinations

“…Unlike traditional structures [1,2], the 500 m aperture spherical radio telescope is the world's largest single-aperture radio telescope [3][4][5]. Active deformation is the most obvious characteristic of the telescope's reflector.…”

Study on the Nonlinear Stability and Parametric Analysis of a Tensile–Beam Cable Dome

“…Stability capacity refers to the ability of a structure to hold its form or undergo deformation in a loading state [9,10]. By utilizing the meshless generalized finite difference method (GFDM), Wang et al [11] proposed a system for 3D composite elastic materials.…”