Experimental Study on Load Carrying Capacity Enhancement of System Supports Considering Full Installation of Bracing Mem
- PDF / 3,568,486 Bytes
- 17 Pages / 595.276 x 790.866 pts Page_size
- 54 Downloads / 182 Views
International Journal of Steel Structures https://doi.org/10.1007/s13296-020-00430-5
Experimental Study on Load Carrying Capacity Enhancement of System Supports Considering Full Installation of Bracing Members Hyung Do Lee1 · Jeong‑Hun Won2 · Nam‑Gwon Jang2 · Ho‑Seong Mha3 · Seong‑choon Jeong4 · Seungjun Kim5 Received: 24 January 2020 / Accepted: 16 October 2020 © Korean Society of Steel Construction 2020
Abstract This study investigated the ultimate load capacity of assembled system supports by comparing cases with and without bracing members. Supports used as temporary structures are essential to resist the concrete casting load. Current trends encourage the use of system supports to prevent the collapse of supports, which occur frequently. Studies regarding the ultimate behavior of system supports in Korea are fewer than those in other countries. Existing studies have only focused on the behavior of unit members, such as vertical members. However, studies that focused on unit vertical members under axial loading reported difficulty in predicting the ultimate behavior of assembled system supports. Furthermore, the ultimate strength of the system support can be decreased significantly in cases without a bracing member, which occur frequently at actual sites. Therefore, the ultimate behavior of the system support considering actual construction site conditions was investigated through experimental tests, focusing on whether bracing members were installed. Experimental results showed that the load-carrying capacity of a three-story system support without a bracing member was 38.4% that of the system support with full bracing members. In addition, the load-carrying capacity of the three-story system support without bracing members decreased by 41.2% compared with that of a two-story system support without bracing members. This indicates that the installation of bracing members is essential for increasing the ultimate load capacity of system supports, and the number of stories of system supports should be considered to determine their ultimate strength. Keywords System support · Bracing member · Ultimate strength · Experimental test
1 Introduction Supports that resist concrete casting load are temporary structures essential to the construction of concrete structures. Among the various types of supports, assembled system supports have been used recently because of their structural * Jeong‑Hun Won [email protected] 1
Korea Institute of Civil Engineering and Building Technology, Goyang, Gyeonggi 10223, Republic of Korea
2
Department of Safety Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
3
Department of Civil Engineering, Hoseo University, Asan, Chungnam 31066, Republic of Korea
4
Occupational Safety and Health Research Institute, Ulsan 44429, Republic of Korea
5
School of Civil, Architectural, and Environmental Engineering, Korea University, Seoul 02841, Republic of Korea
safety as well as convenience in installation and dismantling. To reduce the dama
Data Loading...
