工程力学 ›› 2019, Vol. 36 ›› Issue (1): 138-145.doi: 10.6052/j.issn.1000-4750.2017.11.0812

• 土木工程学科 • 上一篇    下一篇

基于弹头型屈服的轻骨料混凝土强度准则

叶艳霞, 张志银, 刘月, 张春苗   

  1. 长安大学建筑工程学院, 陕西, 西安 710061
  • 收稿日期:2017-11-02 修回日期:2018-02-06 出版日期:2019-01-29 发布日期:2019-01-10
  • 通讯作者: 张志银(1992-),男,陕西人,硕士生,从事混凝土结构理论和结构非线性分析理论研究(E-mail:2311208316@qq.com). E-mail:2311208316@qq.com
  • 作者简介:叶艳霞(1970-),女,河南人,副教授,博士,从事混凝土结构理论和结构非线性分析理论研究工作(E-mail:yeyanxia@chd.edu.cn);刘月(1993-),女,安徽人,硕士生,从事结构工程研究(E-mail:1151798658@qq.com);张春苗(1992-),男,安徽人,硕士生,从事混凝土结构理论和工程材料试验研究(E-mail:765336996@qq.com).
  • 基金资助:
    国家自然科学基金项目(51308065)

A STRENGTH CRITERION FOR LIGHTWEIHT AGGREGATE CONCRETE BASED ON WARHEAD YIELD

YE Yan-xia, ZHANG Zhi-yin, LIU Yue, ZHANG Chun-miao   

  1. School of Civil Engineering of Chang'an University, Xi'an, Shaanxi 710061, China
  • Received:2017-11-02 Revised:2018-02-06 Online:2019-01-29 Published:2019-01-10

摘要: 试验表明轻骨料混凝土和普通混凝土在多轴应力下具有不同的力学特性和破坏规律,因此那些针对普通混凝土建立的强度准则将不能完全适用于轻骨料混凝土。考虑到轻骨料混凝土和岩土材料具有相似的破坏特征,该文适当的调整了岩土材料的弹头型屈服函数作为子午线方程,并选取了William-Warnke模型的椭圆曲线作为π平面形状函数,建立了一个连续、光滑、封闭的弹头型轻骨料混凝土强度准则。该准则克服了二次抛物线型强度准则不光滑和椭圆型强度准则在高静水压力下过于保守的缺陷,能够较好的描述轻骨料混凝土破坏曲面的几何特征。利用最小二乘法量化了强度准则,通过与试验数据对比,验证了所建议的弹头型强度准则的合理性。

关键词: 轻骨料混凝土, 强度准则, 弹头型屈服函数, π平面形状函数, 拉压子午线

Abstract: Experiments show that lightweight aggregate (LWA) concrete and normal concrete have different mechanical properties and failure rules under multi-axial stress. Consequently, the strength criteria for normal concrete do not apply to LWA concrete. Considering the similar failure feature of LWA concrete with geomaterials, a continuum, smooth and closed warhead type strength criterion for LWA concrete was established. The criterion adjusted the warhead type yield function of geomaterials for meridian equation and selected the elliptic curve of the William-Warnke model for the π-plane shape function. The criterion overcame the unsmooth disadvantage of the parabolic-type strength criterion and the conservatism of elliptic strength criterion under high hydrostatic pressure. It can better describe the geometrical characteristics of the LWA concrete. The strength criterion was quantified by using the least square method. Additionally, the rationality of the suggested warhead-type strength criterion was verified by comparing with experimental data.

Key words: lightweight aggregate (LWA) concrete, strength criterion, warhead type yield function, π-plane shape function, tensile and compressive meridian

中图分类号: 

  • TU528.2
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