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Probabilistic reliability design method for arched open cavity structure with backfill soil under rockfall impact

A design method and technology of structural design, applied in calculation, instrumentation, geometric CAD, etc., can solve problems such as calculation of failure probability of structures with arched open holes

Active Publication Date: 2019-11-05
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, the probabilistic reliability design method of the arched open cavity structure with backfilled soil under the impact of falling rocks provided by the present invention solves the problem that the failure of the arched open cavity structure with backfilled soil under the impact of falling rocks in the prior art cannot be solved. The problem of calculating probability

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  • Probabilistic reliability design method for arched open cavity structure with backfill soil under rockfall impact
  • Probabilistic reliability design method for arched open cavity structure with backfill soil under rockfall impact
  • Probabilistic reliability design method for arched open cavity structure with backfill soil under rockfall impact

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Embodiment Construction

[0018] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0019] refer to figure 1 , figure 1 Shown is a flow chart of the probabilistic reliability design method for arched open cavity structures with backfill soil under the impact of falling rocks; the method includes steps 101 to 106.

[0020] In step 101, according to the structural design parameters of the arched open hole, a structural ultimate bearing capacity model of the arched open hole is constructed:

[0021]

[0...

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Abstract

The invention discloses a probabilistic reliability design method for an arched open hole structure with backfill soil under the impact of falling rocks. The limit state equation of the arched open cavity structure with backfill soil; according to the limit state equation, the structural reliability index of the arched open cavity is calculated by using the JC method in the first-order second-order moment method; judging whether the structural reliability index meets the structural reliability index is equal to the target reliability The index and structural reliability index are greater than the target reliability index and the value beyond the target reliability index is less than or equal to the set threshold. If it is satisfied, the selected structural design parameters and the probability reliability of the arched open hole structure designed for the backfill thickness meet the design requirements; If it is not satisfied, adjust the structural design parameters and / or backfill thickness of the arched open tunnel until the probabilistic reliability of the arched open tunnel structure designed by the selected structural design parameters and backfill thickness meets the design requirements.

Description

technical field [0001] The invention relates to the technical field of structural design of arched open tunnels, in particular to a probabilistic reliability design method for arched open tunnel structures with backfill soil under the impact of falling rocks. Background technique [0002] The arched open hole is an effective protection engineering, and the engineering application prospect is broad. Compared with the engineering application of arched open tunnels, the calculation method for rockfall impact force on open tunnel structures has remained at a semi-empirical and semi-theoretical level for a long time. Statistical characteristics and distribution types of rockfall impact loads, and structural failure modes and ultimate bearing capacity under rockfall impact are not clear, and structural reliability analysis and design cannot be carried out. It is an urgent problem to be solved in the current mountainous traffic engineering construction to effectively judge the mec...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/13
Inventor 王玉锁吴正群唐建辉郭春冯高飞李正辉王涛何俊男周良徐铭吴浩王志龙李俊杰杨超曾宏飞王琦王岩
Owner SOUTHWEST JIAOTONG UNIV
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