（土木工程安全与耐久教育部重点实验室， 清华大学土木工程系， 北京 100084）

［摘要］为研究高强钢轴压构件计算模式的不定性，总结了已有文献关于高强钢轴心受压构件的整体稳定承载力试验数据和有限元数值计算结果，并利用在编的《高强钢结构设计规程》中的轴心受压构件整体稳定承载力计算公式计算了整体稳定系数。对这些数据采用数理统计的方法，分析了高强钢轴心受压构件整体稳定承载力的试验值与理论值、理论值与规范值差异的不定性，检验了其服从的概率分布，计算得到了统计参数；在此基础上，计算了高强钢轴心受压构件计算模式不定性的统计参数，为下一步提出高强度钢材材料设计指标提供了依据。

［关键词］高强钢; 轴心受压; 计算模式不定性; 统计参数

中图分类号：TU391      文献标识码：A      文章编号：1002-848X(2014)16-0036-05

Research on resistance model uncertainty of high-strength steel axial compression members

Shi Gang, Zhu Xi

 (Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China)

Abstract: In order to investigate the resistance model uncertainty of high-strength steel axial compression members, experiment data of overall stability bearing capacity and numerical results from finite element method were summarized. The overall stability coeffcient was calculated by using the overall stability bearing-capacity formula of axial compression members in Specification for design of high-strength steel structures which was being compiled. The differences between experiment values and theoretical values, theoretical values and code values of overall stability bearing capacity of high-strength steel axial compression members had been analyzed by mathematical statistics method. The probability distribution was examined and the statistical parameters were obtained. On this basis, the statistical parameters of resistance model uncertainty of high-strength steel axial compression members have been obtained, which will provide the basis for the design index of high-strength steel.

Keywords: high-strength steel; axial compression; resistance model uncertainty; statistical parameter

*北京高等学校青年英才计划项目(YETP0077)。

作者简介：施刚，副教授，博士生导师，Email：shigang@tsinghua.edu.cn。

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