土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (2): 152-158.

• 专题论述 • 上一篇    下一篇

锚索框架梁的双参数法优化分析

王春光1，朱寿增1,2，刘玉坤1，庞邦辉1，惠杨磊1   

  1. (1.桂林理工大学土木与建筑工程学院，广西桂林 541004；2.广西岩土力学与工程重点实验室，广西桂林 541004）
  • 收稿日期:2019-04-19 修回日期:2019-04-24 出版日期:2020-05-20 发布日期:2020-05-20
  • 通讯作者: 朱寿增（1963-），男，副教授，研究方向为地基基础工程，地质灾害防治，环境岩土工程与检测等。
  • 作者简介:王春光（1989-），男，在读研究生，研究方向为岩土体稳定性分析与加固。

Optimization of Anchored Frame Beams Using Two-Parameter Method

WANG Chunguang1, ZHU Shouzeng1,2, LIU Yukun1, PANG Banghui1, HUI Yanglei1   

  1. (1.School of Civil and Architectural Engineering, Guilin University of Technology, Guilin 541004;
    2.Guangxi Key Laboratory of Rock Mechanics and Engineering, Guilin 541004)
  • Received:2019-04-19 Revised:2019-04-24 Online:2020-05-20 Published:2020-05-20

摘要： 采用双参数法分别分析了不同悬臂长度、跨距条件下弯矩极值随柔度特征值λ的变化规律。计算结果表明，基础梁的弯矩值并非由地基基床系数或梁的抗弯刚度单独决定，而是由柔度特征值λ决定；悬臂段长度与跨距的比值决定了梁端的弯曲方向，间接影响了梁的整体弯矩值；当柔度特征值λ较小，悬臂段长度与跨距的比值在0.32～0.35范围内时，随着λ减小，基础梁的弯矩变化幅度不大，即受λ影响较小，此时框架梁受力更加合理。

关键词: 锚索框架梁, 双参数法, 参数分析, 结构优化

Abstract: The Two-Parameter Method was used for the analysis of maximum bending moments in relation with the flexibility eigenvalue lambda under various cantilever arm and span lengths. The results show that the bending moment of foundation beam is not determined by the coefficient of foundation subgrade or the bending stiffness of the beam, but by the eigenvalue of flexibility. The ratio of the cantilever arm length to the span length determines the bending direction at the end of the beam and indirectly affects the overall bending moment of the beam. When the eigenvalue of flexibility is small and the ratio of cantilever length to span is in the range of 0.32～0.35, with the decrease of lambda, the change of bending moment of the foundation beam is small, in other words, the influence of lambda is small, so the stress in the frame beam is more reasonable.

Key words: anchored frame beams, two-parameter method, parametric study, structural optimization

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