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CN-121994441-A - Experimental method for beam column type target guardrail structure and beam column type target guardrail structure

CN121994441ACN 121994441 ACN121994441 ACN 121994441ACN-121994441-A

Abstract

The experimental method of the beam column type target guardrail structure and the beam column type target guardrail structure comprises the steps of 1, obtaining a plurality of original guardrail structures, 2, simulating disturbance degrees of structural parameters of the original guardrail structures on a flow field, screening to obtain a primary screening guardrail structure based on a set mode, 3, simulating anti-collision performance of the structural parameters of the primary screening guardrail structure, screening a secondary screening guardrail structure which meets the safety protection level of a target, 4, verifying the disturbance degrees of the secondary screening guardrail structure on the flow field in a wind tunnel experiment mode, and 5, obtaining the secondary screening guardrail structure which meets the safety protection level of the target by adopting a real collision simulation experiment on the secondary screening guardrail structure verified by the wind tunnel experiment.

Inventors

  • MA LEI
  • CHEN ZHONG
  • WANG FENGLONG
  • LI NANNAN
  • ZHANG HONGSONG
  • LI JIE
  • LI PENGBO
  • Cong Xubin
  • YANG ZITONG
  • WEI ZHENXUN
  • PAN XINGYU
  • ZHU HUI
  • WANG CHENGHU
  • FU XIAO
  • SHEN LINLIN
  • LIU JIAN
  • HU ZHIXUAN

Assignees

  • 新疆交通科学研究院有限责任公司
  • 北京中交华安科技有限公司
  • 新疆交通投资(集团)有限责任公司

Dates

Publication Date
20260508
Application Date
20251021
Priority Date
20251016

Claims (10)

  1. 1. The experimental method of the beam column type target guardrail structure is characterized by comprising the following steps of: Step 1, acquiring a plurality of original guardrail structures; step 2, simulating the disturbance degree of structural parameters of the original guardrail structure on a flow field, and screening to obtain a primary screening guardrail structure based on a set mode; step 3, simulating the anti-collision performance of the primary screening guardrail structure, and screening the primary screening guardrail structure which meets the target safety protection level and is used as a secondary screening guardrail structure; step 4, verifying the disturbance degree of the two-screen guardrail structure on the flow field in a wind tunnel experiment mode; and step 5, acquiring the two-screen guardrail structure verified by the wind tunnel experiment by adopting a real collision simulation experiment to obtain the guardrail structure meeting the target safety protection level as a target guardrail structure.
  2. 2. The method of claim 1, wherein simulating the degree of disturbance of the flow field by the structural parameters of the original guardrail structure comprises: and 2.1, simulating the disturbance degree of structural parameters of the original guardrail structure on the flow field by adopting a CFD simulation flow field.
  3. 3. The method of claim 2, wherein the structural parameters of the original guardrail structure comprise a first tube type parameter; The simulation of the disturbance degree of the structural parameters of the original guardrail structure to the flow field by adopting the CFD simulation flow field comprises the following steps: The first wind speed area index corresponding to the first tubular parameter, wherein the analog quantity of the first wind speed is smaller than or equal to the starting wind speed of the set substance; the setting mode comprises the following steps: And 2.11, screening tubular parameters which are used as a primary screening guardrail structure and accord with the disturbance degree of the target flow field based on the negative correlation between the disturbance degree of the flow field and the air permeability, wherein the relationship between the first wind speed area index and the air permeability is negative.
  4. 4. A method of testing a target barrier structure according to claim 3, wherein the structural parameters of the original barrier structure include a first beam number parameter; The simulation of the disturbance degree of the structural parameters of the original guardrail structure to the flow field by adopting the CFD simulation flow field comprises the following steps: The simulation quantity of the second wind speed is larger than the starting wind speed of a set substance and the overlapping index of the second wind speed region index and a set pavement index; the setting mode comprises the following steps: And 2.12, screening the number of the cross beams which meet the disturbance degree of the target flow field and are used as the number parameters of the cross beams of the primary screening guardrail structure based on the positive correlation of the overlapping index and the air permeability.
  5. 5. The method of claim 1, wherein simulating the crash performance of the structural parameters of the primary screening guardrail structure comprises: and 2.2, simulating the anti-collision performance of structural parameters of the primary screening guardrail structure by adopting a finite element simulation collision experiment.
  6. 6. The method of claim 1-5, wherein the wind tunnel test comprises at least one of an empty wind tunnel test and a dielectric stack contrast test.
  7. 7. The method of claim 1-5, wherein the target safety barrier is SA grade.
  8. 8. The method of claim 1-5, wherein the tubular parameters of the subject guard rail structure are oblong.
  9. 9. The method for testing the target guardrail structure according to any one of claims 1-5, wherein the number of the cross beams of the target guardrail structure is 3, and the spacing between the upright posts of the target guardrail structure is 3m.
  10. 10. The beam column type target guardrail structure is characterized by comprising a plurality of beams and upright columns, wherein the beams are sequentially distributed along the vertical direction, the upright columns are used for supporting the beams, the cross sections of the beams are flat elliptic, the beams comprise narrow edge parts, and the narrow edge parts of the beams are opposite to the upright columns in the thickness direction of the target guardrail structure and are fixedly connected with the upright columns.

Description

Experimental method for beam column type target guardrail structure and beam column type target guardrail structure Technical Field The invention relates to the technical field of road safety engineering, in particular to an experimental method of a beam-column type target guardrail structure and the beam-column type target guardrail structure. Background In areas where snow is blown by wind and sand is blown by wind, the traditional target guardrail structure has obvious blocking effect on the flow of the wind and the snow and the flow of the wind and the sand, and snow and sand accumulation on road sections are easy to cause, so that traffic accidents are caused. Although the cable type guardrail reduces the blocking effect, the deformation amount is large, the protection capacity is weaker, the highest safety protection level is only SB level, and the protection requirement of the high-level highway cannot be met. Disclosure of Invention The invention aims to provide an experimental method of a beam column type target guardrail structure and the beam column type target guardrail structure, and the beam column type target guardrail structure can meet target ventilation rate and target safety protection level through improvement of the experimental method of the beam column type target guardrail structure. In order to achieve the above object, the present invention provides an experimental method of a beam-column type target guardrail structure, the experimental method comprising: Step 1, acquiring a plurality of original guardrail structures; Step 2, simulating the disturbance degree of structural parameters of the original guardrail structure on the flow field, and screening to obtain a primary screening guardrail structure based on a set mode; Step 3, simulating the anti-collision performance of structural parameters of the primary screening guardrail structure, and screening the structure which meets the safety protection level of a target and is used as a secondary screening guardrail structure; step 4, verifying the disturbance degree of the two-screen guardrail structure on the flow field in a wind tunnel experiment mode; And step 5, acquiring the two-screen guardrail structure verified by the wind tunnel experiment by adopting a real collision simulation experiment as the target guardrail structure meeting the target safety protection level. By adopting the technical scheme of the application, the original guardrail structure is screened by adopting a simulation technology, a wind tunnel experiment and an actual measurement impact mode to obtain the target guardrail structure, so that the target guardrail structure meeting the target safety protection level and the target air permeability can be obtained. Based on the experimental method, the target guardrail structure of the high-grade highway, which is applicable to the areas facing wind snow blowing and sand calamity harmful to wind blowing, can be developed. Optionally, the original guardrail structure comprises a tubular parameter and a beam quantity parameter, and the disturbance degree of the structural parameter of the simulated original guardrail structure to the flow field comprises: And simulating the disturbance degree of structural parameters of the original guardrail structure on the flow field by adopting the CFD simulation flow field. Optionally, the structural parameters of the original guardrail structure include a first tubular parameter; The disturbance degree of the structural parameters of the original guardrail structure on the flow field simulated by adopting the CFD simulated flow field comprises a first wind speed region index corresponding to a first tubular parameter, and the simulation quantity of the first wind speed is smaller than or equal to the starting wind speed of a set substance; the setting mode comprises the following steps: And 2.11, screening tubular parameters which are used as a primary screening guardrail structure and accord with the disturbance degree of the target flow field based on the negative correlation between the disturbance degree of the flow field and the air permeability of the guardrail structure, wherein the first wind speed area index and the air permeability are in negative correlation. Optionally, the structural parameters of the original guardrail structure include a first beam quantity parameter, and the disturbance degree of the structural parameters of the original guardrail structure on the flow field simulated by adopting the CFD simulated flow field includes a second wind speed region index corresponding to the first beam quantity parameter, wherein the simulation quantity of the second wind speed is greater than the starting wind speed of a set substance and the overlapping index of the second wind speed region index and a set pavement index; the setting mode comprises the following steps: and 2.12, screening the number of the cross beams which meet the disturbance degree of the