混凝土在单调和循环荷载下的三维随机损伤模型

IF 10.9 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement and Concrete Research Pub Date : 2023-09-01 DOI:10.1016/j.cemconres.2023.107208

Yanpeng Wang

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引用次数: 2

摘要

作者和Li先前提出的混凝土在单调和循环荷载下的随机损伤模型扩展到三维应力状态。具体而言，提出了一种新的损伤能量释放率的热力学表达形式，并进一步阐述了混凝土损伤演化的一些基本概念。通过对现有试验的仔细验证表明，该模型能够很好地捕捉混凝土的速率效应，并能够真实地模拟从单轴拉伸到侧限压缩的大范围应力状态下的单调强度、循环寿命及其伴随的随机性。

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A 3D stochastic damage model for concrete under monotonic and cyclic loadings

A stochastic damage model previously proposed by the author and Li for concrete under monotonic and cyclic loadings is extended to 3D stress states. Specifically, a novel expression form of damage energy release rate, which is the damage driving force thermodynamically, is initiated, and some basic concepts related to concrete damage evolution are further demonstrated. Careful validation of the model against existing experiments reveals that the model is able to well capture the rate effect of concrete and to realistically simulate the monotonic strength, cyclic life, and their accompanying randomness for a wide range of stress states from uniaxial tension to confined compression.

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来源期刊

Cement and Concrete Research 工程技术-材料科学：综合

CiteScore

20.90

自引率

12.30%

发文量

318

审稿时长

53 days

期刊介绍： Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.