|本期目录/Table of Contents|

[1]钱向东,姜弘道.多轴强度安全系数的定义及应用[J].建筑科学与工程学报,2008,25(01):38-42.
　QIAN Xiang-dong,JIANG Hong-dao.Definition and Application of Safety Factor for Multiaxial Strength[J].Journal of Architecture and Civil Engineering,2008,25(01):38-42.
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多轴强度安全系数的定义及应用(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
25卷
期数:
2008年01期
页码:
38-42
栏目:
出版日期:
2008-03-20

文章信息/Info

Title:
Definition and Application of Safety Factor for Multiaxial Strength
作者:
钱向东，姜弘道
河海大学土木工程学院,江苏南京210098
Author(s):
QIAN Xiang-dong, JIANG Hong-dao
Definition and Application of Safety Factor for Multiaxial Strength
关键词:
多参数强度准则;  多轴应力状态;  失效距离;  安全系数;  三轴试验
Keywords:
multi-parameter strength criterion;  multiaxial stress state;  failure distance;  safety factor;  triaxial test
分类号:
TU311.2
DOI:
-
文献标志码:
A
摘要:
针对基于古典强度理论的传统安全系数定义不能确切地表示材料在多轴应力状态下的安全度,也很难直接应用于一般的多参数强度准则的问题,引入失效距离的概念,给出了多轴强度安全系数的定义及其计算方法。以混凝土材料为例,选择常用的5种强度准则,分别给出了多轴强度安全系数的计算公式。选取3组较为典型的应力组合,分别计算了5种强度准则对应的多轴强度安全系数,所反映的混凝土材料强度状态与三轴试验结果相当吻合。结果表明,所定义的多轴强度安全系数有利于改变现行设计准则中经常采用单轴强度安全系数的习惯,为更加科学合理地进行结构强度设计和校核提供了有效的工具。
Abstract:
The conventional safety factor based on classical strength theory could not exactly express the safety for materials in multiaxial stress states, and it was difficult to apply the general multi-parameter strength criteria directly. The definition and calculation method of the safety factors for multiaxial strength were proposed by using the concept of failure distance, which was applicable in any stress state and multi-parameter strength criteria. Taking concrete materials as an example, 5 common strength criteria were selected, and the calculation formulae of the safety factors for these criteria were discussed, and thesafety factors of concrete in 3 types of stress state were computed for each criterion. The numerical examples for concrete show that the states of strength described by thesafety factor proposed agree with the results of triaxial test. The results indicate that the safety factor for multiaxial strength has advantage of changing present design criterion which is used to apply the safety factor for uniaxial strength, so as to provide more reasonable and scientific tools for strength design of structures.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2007-11-18
基金项目:国家自然科学基金项目(50379005)
作者简介:钱向东(1963-),男,江苏吴江人,教授,工学博士,E-mail:xdqian@hhu.edu.cn。
更新日期/Last Update: 2008-03-20