混凝土徐变柔度函数逼近的混合智能优化方法

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中图分类号：TU528.1 文献标志码：A

本文引用格式：，陈梦成，谢力，等.混凝土徐变柔度函数逼近的混合智能优化方法[J].华东交通大学学报，2025，42（2）：46-53.

A Hybrid Intelligent Optimization Method for Approximating the Creep Compliance Function of Concrete

Ge Jing²， Chen Mengcheng¹²， Xie Li2 ，Huang Hong1²， Xu Kaicheng1²，Fang Wei1，2 （1.State KeyLaboratoryof Performance Monitoring and Protecting ofRail Transit Infrastructure，East China Jiaotong University，Nanchang 33o013， China; 2.School of Civil Engineering & Architecture， East China Jiaotong University，Nanchang330013，China）

Abstract：The creep compliance function is usually expressed bya Prony series model when using finite element codes to calculate the creep effects of concrete structures.To address the physically meaningless phenomenon of negative，oscilatory and unstable parameters when using traditional single methods （such as the conjugate gradient method and the LM algorithm） to fit Prony series models to experimental creep function data，this paper proposesanovel hybrid intellgent optimization method for Prony series parameter identification.The method establishes an objective optimization function with penalty terms and combines a simulated annealing-genetic hybrid inteligent algorithm with nonlinear programming methods to constrain parameter identification within physically meaningful ranges.Subsequently，a simple and practical calculation formulation for the Prony series was proposed by parameter analysis. It was shown by numerical examples that the proposed method not only effectively eliminates the drawbacks ofconventional approaches，butalso gives the identification with relative erors below

3% .The Prony expression of creep function can be directly applied to the development of finite element software program in calculating the creep effect of concrete structures.

Key words： concrete material; viscoelasticity; creep function; prony series; hybrid intelligent optimization Citation format： GE J， CHEN M C， XIE L，etal. A hybrid inteligent optimization method for approximating the creep compliance function of concrete[J].Journal ofEast China Jiaotong University，2025，42（2）： 46-53.

徐变是混凝土材料的基本特性，其在现代大型混凝土工程结构中的时变效应表现尤为显著[]，对结构的力学性能与安全性有重要影响。（剩余9859字）