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首页> 外文期刊>Structural engineering earthquake engineering >DEVELOPMENT OF WEB SLENDERNESS LIMITS FOR COMPOSITE I-GIRDERS ACCOUNTING FOR INITIAL BENDING MOMENT
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DEVELOPMENT OF WEB SLENDERNESS LIMITS FOR COMPOSITE I-GIRDERS ACCOUNTING FOR INITIAL BENDING MOMENT

机译：初始弯矩考虑的复合I形梁的Web极限极限的开发

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摘要

The positive bending moment capacity of composite steel girders is examined through parametric study employing elasto-plastic finite displacement analyses. The effects of initial bending moment on the bending moment capacity and on the web slenderness limit for section classification are investigated. Observations made during the numerical study indicate that the noncompact web slenderness limits in conventional design standards, which are based on tests of steel I-sections, are conservative for composite sections. Many sections, which are classified as slender by current specifications, demonstrate sufficient flexural capacity as noncompact. The conventional web slenderness limits for noncompact sections, independent of initial bending moment seems inappropriate for composite I-girders. The initial bending moment has considerable effect on the noncompact web slenderness limits. The web slenderness limits for compact and noncompact sections are proposed on the basis of the parametric study.
机译：通过采用弹塑性有限位移分析的参数研究，研究了复合钢梁的正弯矩承载力。研究了初始弯矩对弯矩承载力和腹板细长极限的影响，以进行截面分类。数值研究过程中的观察结果表明，传统设计标准中基于钢I型钢试验的非紧凑纤​​网细长极限对于复合型钢是保守的。根据当前的规范，许多截面被划分为细长截面，因此它们具有足够的挠曲能力，因为其不紧凑。独立于初始弯曲力矩的非紧凑型截面的常规纤网细长度限制似乎不适用于复合工字梁。初始弯矩对非紧凑纤网的伸长极限有相当大的影响。在参数研究的基础上，提出了紧凑和非紧凑型截面的纤细极限。

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