基于滞回曲线以及结构动力方程的混凝土结构抗震稳定性分析

Seismic Stability Analysis of Concrete Structures Based on Hysteretic Curves and Structural Dynamic Equations

摘要:

为准确全面地量化分析研究土木工程建筑中混凝土结构抗震稳定性，提出基于滞回曲线以及结构动力方程的混凝土结构抗震稳定性分析方法。首先采用滞回曲线描述混凝土结构在地震作用下的损伤情况，对滞回曲线模型拐点进行有效操作，确保动力方程对混凝土结构抗震稳定性进行有效分析。其次采用基于混凝土结构动力方程的抗震稳定性分析方法，对地震地面运动模型以及结构分析模型来分析混凝土结构的随机地震反应情况，得到混凝土结构随机反应的汇总量，在此基础上通过双参数的结构破坏模型，基于结构稳定性原理，获取运算混凝土结构抗震稳定性的概率表达式，再基于该表达式分析混凝土结构的抗震稳定性情况。实验结果说明，所提方法能够对土木工程建筑中不同类型混凝土构件抗震稳定性进行有效分析，分析结果准确且全面。

Abstract:

To accurately and comprehensively analyze the seismic stability of concrete structures in civil engineering buildings, a method for seismic stability analysis of concrete structures based on hysteretic curves and structural dynamic equations is proposed. A hysteretic curve is first used to describe the damage of concrete structures under an earthquake, and the inflection point of the hysteretic curve model is operated effectively to ensure an effective analysis of the seismic stability of concrete structure by using a dynamic equation. Then the seismic stability analysis method based on the dynamic equation of concrete structure is adopted. Based on the earthquake ground motion model and structural analysis model, the random seismic response of concrete structures is analyzed, and the total amount of the random seismic response is obtained. Then the probability expression for calculating the seismic stability of concrete structures is derived based on the principle of structural stability. Based on this expression, the seismic stability of concrete structures is analyzed. The experimental results are accurate and comprehensive, indicating that the proposed method can effectively analyze the seismic stability of different types of concrete members in civil engineering buildings.