Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (6): 96-101.doi: 10.3969/j.issn.1000-565X.2014.06.015

• Architecture & Civil Engineering • Previous Articles     Next Articles

Homogeneous Generalized Yield Function and Ultimate Bearing Capacity of Structures with Box Section

Ou Wei Zhang Wei Feng Ying- qi Li Qi Yang Lü- feng   

  1. School of Civil Engineering and Architecture∥Key Laboratory of Engineering Disaster Prevention and Structural Safety of the Ministry of Education,Guangxi University,Nanning 530004,Guangxi,China
  • Received:2013-10-25 Revised:2014-04-15 Online:2014-06-25 Published:2014-05-01
  • Contact: 杨绿峰(1966-)，男，教授，博士生导师，主要从事复杂工程结构承载安全性和混凝土结构耐久性研究． E-mail:lfyang@gxu.edu.cn
  • About author:欧伟(1987-)，男，博士生，主要从事结构极限承载力与安全评估研究．E-mail:ouwei@mail．gxu．cn
  • Supported by:

    国家自然科学基金资助项目(51168003， 51169003);广西自然科学基金重大项目(2012GXNSFEA053002)

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Abstract:

As the existing generalized yield function of box section is non- homogeneous,the ultimate bearing capacityof structures with box section obtained by elastic modulus adjustment procedures is often affected by the initial load,and the calculation accuracy is not satisfactory.In order to solve this problem,a homogeneous generalized yieldfunction is developed for box section,and the order of the polynomial expression is determined through error analysis.Then,the element bearing ratio (EBR),the EBR uniformity and the reference EBR for box section are defined,and an elastic modulus adjustment strategy that takes EBR as the basic parameter is proposed.Moreover,an elasticmodulus reduction method for the analysis of ultimate bearing capacity of the structures with box section is presen-ted,and some numerical examples are used to verify the correctness of the method.The results show that the pro-posed method helps to eliminate the effect of the initial load and possesses high calculation accuracy and strong iter-ation stability.

Key words: box section, homogeneous generalized yield criterion, ultimate bearing capacity, elastic modulusreduction method

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