一个有限元可靠性分析平台,用于基于损害指数的RC桥梁脆弱性评估
Hyeonsung Song1, Minsun Kim2, Young-Joo Lee1
1Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan, 44919, Republic of Korea.
Scientific reports
|November 4, 2025
概括
一个新的计算平台有效地使用损坏指数 (DI) 方法评估钢筋混凝土 (RC) 桥梁的脆弱性. 该工具集成了可靠性和有限元分析,用于准确地评估地震脆弱性.
科学领域:
- 土木工程 土木工程是指土木工程.
- 结构工程 结构工程
- 计算力学 计算力学 计算力学
背景情况:
- 钢筋混凝土 (RC) 桥梁是关键基础设施,需要强大的脆弱性评估方法.
- 现有的地震脆弱性评估方法可能是计算密集的.
- 准确的脆弱度曲线对于了解地震事件下的桥梁性能至关重要.
研究的目的:
- 开发和验证一个高效的计算平台,用于RC桥梁的脆弱性评估.
- 将可靠性分析与非线性有限元素 (FE) 分析集成在一起,以量化损害指数 (DI).
- 导出地震脆弱性曲线并评估值不确定性的影响.
主要方法:
- 开发一个集成第一阶可靠性方法 (FORM) 和非线性FE分析的计算平台.
- 在循环负载下将平台应用于空洞的RC桥梁码头.
- 通过实验值校准的多种损伤水平的脆弱性曲线的推导.
- 与蒙特卡洛模拟和对值不确定性的参数研究进行比较.
主要成果:
- 开发的平台实现了与蒙特卡洛模拟相比较的准确性,计算运行量显著减少 (80对2,711).
- 对于RC桥梁码头的各种损伤状态,脆弱度曲线已经成功得出.
- 参数研究强调了值不确定性对所得到的脆弱度曲线的影响.
结论:
- 拟议的计算平台提供了一种有效和准确的方法,用于基于可靠性的RC桥梁的漏洞评估.
- 该平台有助于推导地震脆弱度曲线,这对于地震风险评估至关重要.
- 这种方法为工程师和研究人员提供了宝贵的工具,这些工程师和研究人员从事桥梁安全和弹性.
相关概念视频
Design Consideration
531
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
The factor of safety is another key...
531
Indeterminate Structure
1.4K
Indeterminate structures refer to structures where internal forces and reactions cannot be determined using only the equations of static equilibrium. Indeterminate structures have more unknown forces and reaction forces than equations of static equilibrium that can be used to determine them. Indeterminate structures are often used in engineering to create complex, efficient, and aesthetically pleasing structures. There are various types of indeterminate structures used in engineering and...
1.4K
Fatigue
790
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
790
Cable Subjected to a Distributed Load
1.1K
The analysis of suspension bridges is a complex and critical process that involves multiple factors, including the shape and tension of the main cables. The main cables of suspension bridges are subjected to distributed loads, which result in changes in tensile forces and deformation of the cable. These loads must be carefully considered to ensure that the bridge is safe and capable of supporting the weight of different loads.
1.1K
Maximum Deflection
980
When analyzing beams under unsymmetrical loads, such as a train moving on a bridge, it is crucial to accurately determine the points of maximum stress and deflection. The process involves identifying the maximum deflection of the beam, which may not always occur at its midpoint due to the uneven distribution of the load.
The maximum deflection occurs at a specific point, known as point O, where the tangent to the deflection curve is horizontal. To find point O, the slope of the tangent at any...
The maximum deflection occurs at a specific point, known as point O, where the tangent to the deflection curve is horizontal. To find point O, the slope of the tangent at any...
980
Design of Columns under a Centric Load
516
The design of columns under centric load is a fundamental aspect of structural engineering and is critical for ensuring the stability and integrity of structures. Euler's and Secant's formulas are central to understanding and calculating the critical load and deformation behaviors of columns, providing a basis for safe and effective structural design.
Euler's formula is applicable under the assumption that the column is a perfect, straight, homogenous prism, and it is operating...
Euler's formula is applicable under the assumption that the column is a perfect, straight, homogenous prism, and it is operating...
516


