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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

41卷

期数:

2024年01期

页码:

93-102

栏目:

建筑结构

出版日期:

2024-01-20

文章信息/Info

Title:

Load-bearing capacity study of mounting connector of shared tower under different bolt grades

文章编号:

1673-2049(2024)01-0093-10

作者:

钟炜辉^1,2,赵孟军¹,郑玉辉¹,房正刚³,蒋 成¹

(1. 西安建筑科技大学 土木工程学院,陕西 西安 710055; 2. 西安建筑科技大学 结构工程与抗震教育部重点实验室,陕西 西安 710055; 3. 中国电力科学研究院有限公司,北京 100055)

Author(s):

ZHONG Weihui^1,2, ZHAO Mengjun¹, ZHENG Yuhui¹, FANG Zhenggang³, JIANG Cheng¹

(1. School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi, China; 2. Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi, China; 3. China Electric Power Research Institute, Beijing 100055, China)

关键词:

共享铁塔;  挂载连接件;  螺栓等级;  承载性能;  静力试验;  数值分析

Keywords:

shared tower;  mounting connector;  bolt grade;  load-bearing capacity;  static test;  numerical analysis

分类号:

TU391

DOI:

10.19815/j.jace.2022.03122

文献标志码:

A

摘要:

为研究螺栓等级对挂载连接件承载性能的影响,选取了4.8级普通螺栓(KL-4.8)与8.8级摩擦型高强螺栓(KL-8.8)连接的挂载连接件进行静力试验研究。采用ABAQUS有限元分析软件对其受力性能进行模拟,使用可靠的数值模型系统分析螺栓等级和螺栓直径对连接件承载性能的影响。结果表明:在水平荷载作用下,两种不同螺栓等级连接的挂载连接件节点处均未出现滑移; 两种连接件的破坏模式基本一致,左右两侧方钢管底部及右侧方钢管顶部均出现断裂; KL-8.8的整体刚度、极限承载能力以及变形能力均高于KL-4.8; 当采用4.8级普通螺栓连接且承载力低于74.13 kN时,螺栓直径不宜小于18 mm,否则螺栓杆会发生剪切变形; 当采用8.8级和10.9级高强螺栓连接时,双板件连接处节点偏于刚性连接,挂载连接件的整体刚度和极限荷载主要取决于方刚管、挂载铁杆等其他部件; 挂载连接件在承载过程中通过双板件与主材之间的摩擦力和螺栓抗剪来抵抗外载,实际工程中应根据挂载重量合理选择螺栓参数。

Abstract:

In order to investigate the influence of bolt grade on the load-bearing capacity of mounting connector, the mounting connector connected by 4.8-grade ordinary bolt(KL-4.8)and 8.8-grade frictional high strength bolt(KL-8.8)were selected for static test research. ABAQUS was used to simulate the mechanical performance, and the reliable numerical model was used to systematically analyze the influence of bolt grade and bolt diameter on the load-bearing capacity of the connector. The results show that under the action of horizontal load, there is no slippage at the joint of two kinds of mounting connector with different bolt grades. The failure modes of two connectors are basically the same, and both the bottom of the left and right steel pipes and the top of the right steel pipe are broken. The overall stiffness, ultimate bearing capacity and deformation capacity of KL-8.8 are higher than those of KL-4.8. The bolt diameter should not be less than 18 mm when 4.8-grade ordinary bolt is used and the bearing capacity is less than 74.13 kN, otherwise the bolt rod will be sheared. When 8.8-grade and 10.9-grade high-strength bolts are used for connection, the joints of the double-plate joints tend to be rigid, the overall stiffness and ultimate load of mounting connector mainly depend on other components such as square steel tubes and mounting irons. During the load-bearing process, the mounting connector resists the external load through the friction between the double plates and the main material and the bolt shear. In practical engineering, the bolt parameters should be reasonably selected according to the mounting weight.

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2023-03-29
基金项目:国家自然科学基金项目(52178162); 陕西省重点研发计划项目(2018ZDXM-SF-097)
作者简介:钟炜辉(1980-),男,工学博士,教授,博士生导师,E-mail:zhongweihui1980@163.com。

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更新日期/Last Update: 2024-01-25