在面向地震负载下对平面和垂直不对称的钢筋混凝土建筑进行非线性响应分析
Pramod Kumar1, Seeram Madhuri1, Bamidele Charles Olaiya2
1Department of Civil Engineering, National Institute of Technology, Jamshedpur, Jharkhand, 831013, India.
Scientific reports
|July 28, 2025
概括
非线性动态分析显示,不对称的钢筋混凝土建筑更容易受到地震影响. 底部的刚性不对称性和顶部的质量不对称性在地震期间显著放大了结构反应.
科学领域:
- 结构工程 结构工程
- 地震工程的工程是地震工程.
- 非线性动力学是一种非线性动力学.
背景情况:
- 钢筋混凝土建筑容易受到地震力量的影响.
- 建筑结构中的不对称性可以显著改变它们对地震的动态反应.
- 了解平面和垂直不对称性的影响对于地震设计至关重要.
研究的目的:
- 对平面和垂直不对称的钢筋混凝土建筑进行非线性动态分析.
- 评估不同偏心和垂直质量/刚度不对称对地震响应的影响.
- 为了比较不同不对称配置的脆弱性.
主要方法:
- 为不对称的建筑结构开发数学模型.
- 通过单轴偏心 (6m,12m,18m) 引入平面不对称.
- 通过在不同水平上改变质量或刚度来引入垂直不对称性.
- 在地震力下评估峰值位移和层间漂移比率.
主要成果:
- 建筑物对地震力量的脆弱性随着异常度增加到一定程度.
- 底层的刚性不对称性和顶层的质量不对称性显示出最大的响应.
- 峰值位移达到80毫米 (平面不对称) 和300毫米 (垂直刚性不对称).
- 顶部的质量不对称导致了199.18毫米的峰值反应.
结论:
- 不对称的钢筋混凝土建筑对地震力量的脆弱性增加.
- 垂直不对称的特定配置 (底部刚度,顶部质量) 特别有害.
- 建议对不对称结构进行详细分析,以便在地震设计中准确预测材料故障.
相关概念视频
Beams with Unsymmetric Loadings
168
Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
168
Eccentric Axial Loading in a Plane of Symmetry
287
Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
287
Dynamic Modulus of Elasticity of Concrete
549
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
549
Design of Columns under a Centric Load
184
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...
184
Elastic Curve from the Load Distribution
258
The structural behavior of beams under distributed loads is critical for engineering analysis, which focuses on predicting how beams bend and react under such conditions. Different types of beams (e.g., cantilever, supported, or overhanging) behave differently under distributed load conditions.
For all beams, the analysis of the beam's reaction to distributed loads begins by understanding the relationship between a beam's load and the resulting shear forces and bending moments.
For all beams, the analysis of the beam's reaction to distributed loads begins by understanding the relationship between a beam's load and the resulting shear forces and bending moments.
258
Plastic Deformations of Members with a Single Plane of Symmetry
126
When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
126


