混凝土徐變?nèi)岫群瘮?shù)逼近的混合智能優(yōu)化方法

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中圖分類號：TU528.1 文獻(xiàn)標(biāo)志碼：A

本文引用格式：，陳夢成，謝力，等.混凝土徐變?nèi)岫群瘮?shù)逼近的混合智能優(yōu)化方法[J].華東交通大學(xué)學(xué)報，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，F(xiàn)ang 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.

徐變是混凝土材料的基本特性，其在現(xiàn)代大型混凝土工程結(jié)構(gòu)中的時變效應(yīng)表現(xiàn)尤為顯著[]，對結(jié)構(gòu)的力學(xué)性能與安全性有重要影響。（剩余9859字）