长江科学院院报 ›› 2016, Vol. 33 ›› Issue (9): 138-142.DOI: 10.11988/ckyyb.20150622

• 水工结构与材料 • 上一篇    下一篇

基于ANSYS二次开发的早龄期混凝土徐变应力计算

郭浩洋1,戚蓝2,李少明3,刘勇2,赵芳兴2   

  1. 1.中国电建集团 西北勘测设计研究院有限公司,西安 710065;
    2.天津大学 水利工程仿真与安全国家重点实验室,天津 300072;
    3.杭州市水利规划研究与科技推广中心,杭州 310016
  • 收稿日期:2015-07-20 修回日期:2015-08-26 出版日期:2016-09-25 发布日期:2016-09-22
  • 通讯作者: 戚 蓝(1955-),女,天津人,教授,博士,研究方向为水利工程安全监测等,(电话)13752530685(电子信箱)qilan0000@163.com。
  • 作者简介:郭浩洋(1989-),男,河南洛阳人,助理工程师,硕士,研究方向为混凝土早期裂缝控制研究,(电话)13652117580(电子信箱)509341595@qq.com。

Calculation of Creep Stress of Early-age Concrete Based on Further Development of ANSYS

GUO Hao-yang1, QI Lan2,LI Shao-ming3,LIU Yong2,ZHAO Fang-xing2   

  1. 1.Power China Northwest Engineering Corporation Limited, Xi'an 710065, China;
    2.State KeyLaboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;
    3.Water Conservancy Research and Technology Promotion Centre of Hangzhou, Hangzhou 310016, China
  • Received:2015-07-20 Revised:2015-08-26 Online:2016-09-25 Published:2016-09-22

摘要: 徐变是混凝土材料所具有的时变特性,对早龄期混凝土的应力影响很大,不可忽略,然而工程界主流的通用有限元程序不支持混凝土徐变的计算,不利于工程应用。为此,笔者通过对ANSYS用户子程序usermat进行二次开发,编写了自定义的材料模型,利用ANSYS程序实现了混凝土弹性徐变方程的隐式解法。在此基础上,通过算例验证了该二次开发子程序的正确性,并将其应用于实际工程,通过对比,采用弹性徐变方程隐式解法求得的计算结果与实测值的变化规律相同,数据也比较吻合,误差范围一般在0.3 MPa以内,证明该子程序具有较好的精度,可以推广应用于工程早龄期混凝土温度徐变应力的预测和计算。

关键词: 温度应力场, 早龄混凝土, 徐变, ANSYS二次开发, 隐式解法

Abstract: As a time-dependent property of concrete material, creep imposes significant influence on the stress of early age concrete. However, it is difficult in engineering to calculate the creep stress by using common available finite element programs. In view of this, through further development of the ANSYS user subroutine usermat, a userdefined material model was developed to introduce the implicit solution to the concrete creep equation. With the largest error lower than 0.3 MPa, the user subroutine usermat was verified through calculation examples and was applied to engineering. The results of the implicit concrete creep equation are in good agreement with measured values, and their variation trends are the same. The user subroutine usermat can be applied to engineering to predict and calculate the thermal creep stress of early age concrete.

Key words: thermal stress field, earlyage concrete, creep, further development of ANSYS, implicit solution

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