Tension Bearing Capacity of Key Connections of Standing Seam Metal Roofing System(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2019年01期
- Page:
- 112-119
- Research Field:
- Publishing date:
Info
- Title:
- Tension Bearing Capacity of Key Connections of Standing Seam Metal Roofing System
- Author(s):
- YU Jing-hai; ZHAO Yu-yang; JIANG Zhi-yu; LI Lu-chuan; YAN Xiang-yu
- School of Civil Engineering, Tianjin University
- Keywords:
- standing seam metal roof; tension bearing capacity; connection test; self-tapping screw; failure mode
- PACS:
- -
- DOI:
- -
- Abstract:
- In view of the calculation problems of tension bearing capacity on the connection of fixed support and purlin of standing seam metal roofing, taking the purlin flange thickness, purlin material, diameter of selftapping screw and plate thickness of fixed support as the variables, the tension tests of 92 connection specimens were carried out. Failure phenomena and failure modes of connections under vertical tensile load were investigated. The tension bearing capacity calculation formulas of the connection of fixed bearing and purlin were corrected. The test values of tension bearing capacity were compared with the calculation values of codes at home and abroad. The results indicate that the tension bearing capacity of the selftapping screw is proportional to the purlin flange thickness, purlin material tension strength, diameter of selftapping screw and number of screw. When the bottom plate thickness of fixed support is more than 4 mm, the bearing capacity of screw has little correlation with the bottom plate thickness of fixed support. There are three failure modes including the selftapping screws being pulled out, the bottom plate of fixed support being bent and selftapping screws being pulled out, bottom plate of fixed support being bent and selftapping screws being broken at nut because of pulling. The calculated values of tension bearing capacity of connection at home and abroad are smaller than test values, so the engineering application is safety.
Last Update: 2019-01-23