Abstract
Efficient parking structures are urgently required in Korea. The design of parking structures more than 8 m in height is difficult because both fire and seismic resistance must be considered. Existing designs are uneconomical and conservative. However, the design of parking structures less than 8 m in height is relatively simple and there are few restrictions to the construction. It is essential to optimize the design of parking structures less than 8 m in height. Here, we describe novel wide long-span composite beams that reduce the story height of low parking structures. The flexural capacity of seven of the beams was evaluated; all beams were loaded at two points prior to monotonic bending tests. We also performed finite element analysis (FEA) based on the material properties of the test specimens, and compared the results to those of the structural tests. The flexural strength of the wide composite steel beams increased by approximately 20% as the steel thickness rose by 3 mm, from 6 to 9 mm. The rebar shape (triangular or rectangular) did not affect flexural strength. The flexural strength of beams without rebar was 10% less than that of beams with rebar. The FEA and test results were in good agreement. The section plastic moments were free from global and local instability.
Highlights
The higher load, as well as the longer span on buildings such as high-rise buildings and parking structures, the floor system consisting of beams and slabs of the total structures accounts for more than 70% of the structural construction cost
Due to climate change caused by global warming, on the other hand, the number of days that cannot be carried out on-site construction work is continuously increasing, the need for minimized on-site construction technology is emerging to reduce greenhouse gas emissions in the building sector
A competition for developing the technologies minimizing on-site construction work based on composite structures for realizing long-span, floor height reduction, and construction period reduction has intensified in connection with a heightened interest in research areas of low-carbon green growth due to climate change and a development of high-density and high-rise building technologies in urban areas around the world
Summary
The higher load, as well as the longer span on buildings such as high-rise buildings and parking structures, the floor system consisting of beams and slabs of the total structures accounts for more than 70% of the structural construction cost. In the building sectorwe in 2020, it is absolutely necessary to develop used to construct parking structures, which has a long-span and can save floor height, in order to technology to minimize on-site construction using composite structural system. D’Mello, long-spanned and floor height-reduced composite structures, including shortening of construction and Hawes (2009) [4]), and the Delta Beam system (DCB (2014) [5]; Nadasky (2012) [6]), are not period. It has advantages of easy construction of the facility duct and good looks, it does not. The USFB system has limitations in implementing long-span, and it does not have much effect in reducing the floor height as well as shortening the construction period.
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