钢筋混凝土框架结构的多尺度变异性分析

发布时间：2018-06-02 15:36

本文选题：钢筋混凝土结构 + 拟蒙特卡洛法　；参考：《建筑结构学报》2015年10期

【摘要】：混凝土材料的变异性是造成钢筋混凝土结构非线性受力行为不可精确预测和不可准确控制的重要原因之一。考虑混凝土材料抗压强度的变异性,将具有确定性和高精度特征的拟蒙特卡洛法引入到钢筋混凝土框架结构的非线性静、动力分析中,结合增量变异性分析方法,定量分析了钢筋混凝土框架结构材料的变异性对构件和结构尺度非线性静、动力响应变异性的影响规律。研究结果表明:混凝土材料的变异性在构件尺度和结构尺度具有不同程度的衰减;混凝土材料的变异性在构件尺度呈现出复杂的随机演化特征,导致构件破坏模式和内力重分布路径的多样;在结构尺度,尤其是结构承载力和自振周期上具有相对的稳定性,这为结构整体失效模式的控制提供了可能。
[Abstract]:The variability of concrete material is one of the important reasons that the nonlinear behavior of reinforced concrete structure can not be accurately predicted and controlled accurately. Considering the variability of compressive strength of concrete materials, the quasi-Monte Carlo method with deterministic and high-precision characteristics is introduced into the nonlinear static and dynamic analysis of reinforced concrete frame structures, and the incremental variability analysis method is combined. The influence of the material variability of reinforced concrete frame structure on the nonlinear static and dynamic response of members and structures is analyzed quantitatively. The results show that the variability of concrete materials attenuates to different degrees on the member scale and structural scale, and the variability of concrete material presents complex random evolution characteristics at the component scale. It leads to various failure modes and internal force redistribution paths, and has relative stability in structural scale, especially in structural bearing capacity and natural vibration period, which provides the possibility for the control of structural failure mode as a whole.
【作者单位】：新加坡南洋理工大学土木与环境工程学院;广西大学土木建筑工程学院;
【基金】：国家自然科学基金项目(51368006) 广西自然科学基金重大项目(2012GXNSFEA053002)
【分类号】：TU375.4

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