Page 36 - 水利学报2021年第52卷第11期

Simplified calculation method for the members of novel ground anchor
and beam string debris flow grid dam

1，2 1，2 1，2 1，2
WANG Yongsheng ，LÜ Baohong ，WANG Jinke ，WANG Bing
（1. School of Civil Engineering，Lanzhou University of Technology，Lanzhou 730050，China；
2. Western Center for Disaster Mitigation in Civil Engineering of Ministry of Education，
Lanzhou University of Technology，Lanzhou 730050，China）

Abstract：In view of the impact damage of debris flow prevention structures，based on the concept of "flex⁃
ible energy dissipation" and combined with beam string structure and vertical prestressed anchor technolo⁃
gy，a novel ground anchor and beam string debris flow grid dam is proposed，and the principle and tech⁃
nology are described. The structure can not only improve the mechanical performance， increase its overall
impact resistance， ensure the safety and reliability， but also reduce the cross-section size of the structural
members， save the cost， facilitate the site construction assembly and later operation and maintenance. Ac⁃
cording to the load distribution of debris flow and the stress characteristics of the novel ground anchor and
beam string debris flow grid dam，the simplified calculation method of internal force is given. The finite el⁃
ement model of the new structure was established by using SAP2000，and the overall force of the structure
was analyzed，by which the rationality of the simplified calculation method was verified. Combined with Py⁃
thon language and QT Designer software， the corresponding design and calculation software was developed
to solve the internal force of the novel ground anchor and beam string debris flow grid dam. The results
show that： the above-mentioned dam structure has good impact resistance； the members of structural are
uniformly stressed. In the future design，attention should be paid to the shear brittle failure of the vertical
bar and the eccentric stress of the column to ensure the structural safety. The compatibility of deformation
only makes the internal force of the bottom beam string and the vertical bar larger， in practical engineer⁃
ing application， the bottom member should be checked to prevent its damage. The simplified calculation
method proposed in this paper can accurately reflect the stress characteristics of the structure， and has a
certain rationality. The research can provide theoretical basis and technical support for the design and appli⁃
cation of the novel ground anchor and beam string debris flow grid dam.
Keywords：debris flow control；novel ground anchor and beam string debris flow grid dam；flexible energy
dissipation；internal force calculation；software development

（责任编辑：耿庆斋）

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