摘要
混凝土作为当下应用最为广泛的建筑材料,其自身徐变的特性对结构的耐久性及安全性均有较大的影响,对混凝土徐变预测已经成为复杂结构设计过程中必不可少一个环节。因此为进一步优化数值分析中对混凝土徐变的模拟效果,优化有限元软件中针对混凝土徐变计算过程,本文基于微预应力-固结理论,将预测效果优秀、理论分析合理的B4模型结合粘弹性本构,通过在ABAQUS软件中进行二次开发,编写相应子程序实现其在数值分析中的应用。并通过相应算例证明所构建的子程序可以准确地对混凝土徐变的发展过程进行模拟,能为进一步研究混凝土徐变发展及实际工程应用提供一定参考价值。
As the most widely used building material nowadays,concrete creep characteristics have a significant impact on the durability and safety of structures.Predicting concrete creep has become an essential part of the complex structural design process.Therefore,in order to further optimize the simulation effect of concrete creep in numerical analysis and optimize the calculation process of con‐crete creep in finite element software,this paper was based on the micro pre-stress consolidation theory.The B4 model with excellent prediction effect and reasonable theoretical analysis was combined with viscoelastic constitutive law.Through secondary development in ABAQUS software,corresponding subroutines were written to achieve its application in numerical analysis.And through corresponding examples,it is proven that the constructed subroutine can accurately simulate the development process of concrete creep,which can provide certain reference value for further research on the development of concrete creep and practical engineering applications.
作者
李鹏
LI Peng(School of Architecture and Engineering,Xinjiang University)
出处
《广东建材》
2024年第4期99-102,共4页
Guangdong Building Materials
