|Table of Contents|

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

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

Issue:
2024年01期
Page:
93-102
Research Field:
建筑结构
Publishing date:

Info

Title:
Load-bearing capacity study of mounting connector of shared tower under different bolt grades
Author(s):
ZHONG Weihui1; 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)
Keywords:
shared tower;  mounting connector;  bolt grade;  load-bearing capacity;  static test;  numerical analysis
PACS:
TU391
DOI:
10.19815/j.jace.2022.03122
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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Last Update: 2024-01-25