Residual Bearing Capacity of Damaged Large-Diameter Drum-Welded Spherical Joints Post Disaster
- PDF / 11,495,196 Bytes
- 19 Pages / 595.276 x 790.866 pts Page_size
- 97 Downloads / 150 Views
International Journal of Steel Structures https://doi.org/10.1007/s13296-020-00416-3
Residual Bearing Capacity of Damaged Large‑Diameter Drum‑Welded Spherical Joints Post Disaster Hongbo Liu1,2 · Haotian Gao2 · Mashrah Waleed Ali Hamed2 · Zhihua Chen1,2 Received: 3 September 2019 / Accepted: 21 September 2020 © Korean Society of Steel Construction 2020
Abstract Building structures may encounter strong wind, earthquake, snowstorm, and other disaster loads during their service period. Therefore, the members and joints may incur different degrees of damages. However, some damaged members and joints can continue functioning after reasonable assessment and repair. In this study, drum-welded hollow spherical joints (DWHSJs) that are used in Beijing’s New International Airport were considered as research objects. Experimental and numerical analyses were conducted to investigate the compressive bearing capacity of the DWHSJs and their degradation when they suffered damage. Then, using parametric analysis, the effect of various factors on the degradation of the bearing capacity of damaged joints was revealed. Finally, according to the experimental and numerical analysis results, a practical formula for calculating the bearing capacity of damaged joints under axial compression was proposed. A reduction factor of the bearing capacity based on the residual deformation of joints was introduced in the formula. A comparison showed that the calculation results were relatively consistent with the experimental results. Keywords Post-disaster · Welded hollow spherical joint · Bearing-capacity reduction coefficient · Practical calculation formula
1 Introduction Spatial lattice structures contain different types of joints, including MERO (See and McConnel 1986; Fathelbab 1987), Temcor (Xu et al. 2015; Matteis et al. 2008), cast steel (Du et al. 2017), assembled hub (Han et al. 2017), and welded hollow spherical joints (WHSJs). The WHSJ, which was developed by Professor Liu (2000), has become one of the most widely used joints in spatial lattice structures owing
* Haotian Gao [email protected] Hongbo Liu [email protected] Mashrah Waleed Ali Hamed [email protected] Zhihua Chen [email protected] 1
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
Department of Civil Engineering, Tianjin University, Tianjin 300072, China
2
to its lightweight, high stiffness, simplicity, convenient connection, and mechanical advantages, as shown in Fig. 1. The bearing capacity of structures can reduce owing to damage to joints or members caused by disastrous loads such as strong winds, earthquakes, and fires. However, because of the high safety factor in the design process and the coordinated function of the members, the structure does not entirely collapse (Yin and Zhao 1998). Therefore, the damaged members and joints of the structure can be reused after reasonable repair or replacement. Prior to this process, accurate assessment of the damaged joints or members is essential
Data Loading...
