剪刀撑布置形式对随机初弯曲承插型盘扣式脚手架稳定性影响研究

牟争强; 赵伟; 薛少伟; 赵炳震; 邱睿; 张霓; 赵中伟

doi:10.13206/j.gjgS24120901

剪刀撑布置形式对随机初弯曲承插型盘扣式脚手架稳定性影响研究

doi: 10.13206/j.gjgS24120901

1. 陕西建工集团股份有限公司, 西安 710082;
2. 陕西建工铁建工程有限公司, 西安 710000;
3. 辽宁工程技术大学土木工程学院, 辽宁阜新 123000

基金项目:

陕西省交通运输厅交通科研项目（23-49）；陕西省住房和城乡建设厅科技计划项目（2023-K21）。

详细信息

作者简介:
牟争强，高级工程师，主要从事建筑工程、土木工程施工管理，46910539@qq.com。

通讯作者:
张霓，工学博士，副教授，硕士生导师，主要从事施工力学研究，zhangni@lntu.edu.cn。

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出版历程
- 收稿日期: 2024-12-09
- 网络出版日期: 2025-11-29

Research on the Effects of Scissor-Brace Arrangement on the Stability of Socket-Type Cup-Lock Scaffolds with Random Initial Imperfections

1. Shaanxi Construction Engineering Group Co., Ltd., Xi'an 710082, China;
2. Shaanxi Railway Construction Engineering Co., Ltd., Xi'an 710000, China;
3. School of Civil Engineering, Liaoning Technical University, Fuxin 123000, China

摘要

摘要: 作为临时作业平台的脚手架在现今逐渐成为工程中不可或缺的一部分。但由于其立杆的反复使用致使脚手架倒塌所引起的事故很多，严重危害了工人的人身安全。实际上，脚手架立杆所产生的弯曲几何缺陷是随机的。在此种随机几何缺陷作用下，剪刀撑布置形式对脚手架承载能力的影响很大。因此，通过ANSYS有限元软件建立了基于随机有限元分析方法下的精细化有剪刀撑脚手架有限元模型，并通过该方法研究了垂直剪刀撑跨数变化对脚手架荷载系数及屈曲模态的影响规律。研究表明：脚手架的荷载系数由其屈曲模态所决定；剪刀撑跨数与脚手架承载能力呈正相关；垂直剪刀撑对不设置横向约束的脚手架承载能力提升165.2%，对设置横向约束的脚手架承载能力提升146.9%；剪刀撑布置位置的不同对脚手架承载能力存在影响，相同数量的剪刀撑因x、y方向交点位置不同而不同，在设置横向约束的脚手架中每6跨布置的屈曲系数更大，无横向约束时则每8跨布置更优，且会改变荷载系数域数量。
- 重型承插型盘扣式脚手架 /
- 立杆初始弯曲随机几何缺陷 /
- 随机有限元分析 /
- 稳定性研究 /
- 屈曲模态
Abstract: Scaffolding， which provides temporary platforms for workers， has become an integral part of modern construction. However， frequent accidents caused by the collapse of scaffolding due to the repeated use of its poles， which seriously endangers the personal safety of workers. In practice， the bending geometric imperfections in scaffolding upright poles are random. It has been found that under the influence of such random geometric imperfections， the arrangement of scissor braces significantly has a great impact on the bearing capacity of the scaffold. Therefore， this paper established a refined finite element model of the scaffold with scissor braces based on the stochastic finite element analysis method through the ANSYS finite element software， and studied the influence of varying the number of vertical scissor braces on the load factor and buckling mode of the scaffold. The research showed that the load factor of the scaffold was determined by its buckling mode. The span of the scissor braces was proportional to the bearing capacity of the scaffold. Specifically， the bearing capacity increased by 165.2% in the scaffold without lateral constraints， and by 146.9% in that with lateral constraints. Furthermore， the positioning of the scissor braces also influenced the bearing capacity of the scaffold. For the same number of diagonal braces， differences in the intersection positions along the x and y directions led to varying effects. In the scaffold with lateral constraints， arranging braces every 6 spans resulted in a higher buckling coefficient， while in the scaffold without lateral constraints， arranging them every 8 spans was more effective. This arrangement also affected the number of load factor domains.

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