Corrugated Steel Structure (CSS), which was applied in North America in the early 1900s and has been installed in more than 1,000,000 places worldwide, has been in service since 1996, 100 years later, in Korea with POSCO, Korea Expressway Corporation, Seoul National University, Hanyang University, etc. It has been applied to the domestic market through commercialization research by specialized companies. Based on this, since the 2000s, it has been widely applied to road crossing passages, waterways and local small rivers, animal movement ecological passages, and Piam tunnels. Based on the advantages and economic feasibility of minimizing the existing vehicle traffic control during construction, it is a universal new construction method along with the existing reinforced concrete construction method. About 5000 corrugated steel plate structures have been installed and operated in Korea for 20 years.
However, regarding the various advantages of the construction method and the rapidly occurring demand, in the beginning, detailed explanations of the national design standards and specifications were insufficient. Problems such as deformation of the corrugated steel sheet occurred intermittently due to the lack of understanding of the backfill material and backfill compaction, which are the most important factors in
To improve this, ChungAmEnC has continuously improved and supplemented related standards through R&D with various related organizations, and based on domestic and foreign failure cases, provides optimized design solutions in advance for possible problems during actual construction. Optimized solutions include Virtual Construction: a three-dimensional system for step-by-step forecasting processes. (BIM LoD: 350 / Tekla, Trimble) and 3D Scanning (Leica P30 System, Cyclone ) Minimize errors that may occur at each construction stage I did. In addition, by providing 3D FEM, 3D printing and landscape design solutions, we will do our best to become a company that continuously develops and provides the world's best solutions that overcome the uncertainty of design and construction anxiety that customers have felt.
History of CSS
In 1896, an American civil engineer James. H. Watson and Starting with Stanley Simpson's patent, it was applied to small drainage channels in North America until the 1930s, and by the late 1900s, the maximum span was applied up to 11m and expanded to small bridges, passageways, and military facilities (ammunition depots). Since the 2000s, the span has been extended to 23m and applied to ecological tunnels, mine stockpiles, reclaim tunnels, and military facilities (hangars). 2014-2016 R&D and commercialization of extra-corrugated corrugated steel sheet (EXSCor) of Cheongam EnC With success, the maximum span was extended to 40m. It satisfies the maximum loads of CAT 797F (about 620 tons), EURO LM71, mine trucks, which could not be applied in the past with respect to live loading along with the expansion of span, so that it is economical, stable, and workable than concrete structures in multi-step processes. has enough competitiveness. In addition, extra corrugated steel sheet (EXSCor) is listed as a construction method and product according to design standards in Korea (KDS, KCS) as well as AASHTO LRFD and ASTM A796M in the United States.
Solution DSA Bridge
Corrugated Steel Sheet ABC (Accelerated Bridge Construction: ABC) Solution
The bridge construction industry is moving rapidly towards prefabricated and modular bridges. Rapid bridge design and construction is very important to users, builders and owners. CSS ABC is providing solutions for Short Span Bridges based on a lot of know-how. Smaller bridges and gutters can be built quickly for local use and can be designed using prefabricated components that are easy to install and deliver significant cost savings. CSS ABC provides long service life with minimal maintenance and offers unparalleled sustainable benefits compared to other construction methods.
Applicable CSS ABC Short Span Bridge can be designed, manufactured and installed to accommodate a minimum span of 2m to a maximum of 20m (based on short span). In addition, for flood damage and emergency installation, it is configured as a modular system that is easy to store by container in advance, so that it can be installed very quickly in any emergency situation.
DSABridge® (Deck Slab Arch Bridge)
DSABRIDGE (Deck Slab Arch Bridge) The box-type corrugated steel plate bridge structure is different from the ARCH-type corrugated steel plate axial force-dominant structure, in which bending moment dominates. In order to maintain the box-shaped cross section as much as possible, negative moments occur at both corners (hunches) with the greatest change in curvature, and the crowns have structural characteristics that receive positive moments. The structural form of the upper part (crown) of DSABRIDGE is ➞ a stress relaxation slab is applied through the shear connecting material connecting the corrugated steel plate and the upper slab to secure the member force corresponding to the positive moment. The negative moment generating force of the Hunch part calculates the stress range at a certain distance for each span, ➞ Installed the side wall outside ➞ Filled the side wall with high-quality soil and concrete to ensure the rigidity for the structural backfill range. will configure.
The design standard is based on the road bridge design (limit state design method) , using the MIDAS GTS NX program, modeling the same as the actual structure, and applying the load (KL-510) and ground constant suitable for the site conditions.
Haunch Moment reduced by 66%
The DSABridge structure can be designed economically by reducing the stress of the lower foundation as the upper structure reduces the volume weight by more than 30% compared to the existing concrete ramen bridge and composite ramen bridge. In addition, as the pillars essential for various types of Ramen bridges are applied as corrugated steel sheets, there are advantages of simplification of the process and clear scope of responsibility. In addition, due to the inherent rigidity of the corrugated steel plate (concrete pouring pressure safety review), no copper rod is required when pouring the upper part of the concrete. It has superior advantages over other methods for natural river damage.
Corrugated steel plate wall
The design price (PPS registration price) based on the upper area of the bridge is 1,000 won/m2 (20m span), so when compared with the existing synthetic Ramen bridge (1,600 won/m2) Construction cost savings of up to 40% can be secured, and since the corrugated steel sheet, the main material of DSABridge, can be supplied with materials provided by the Public Procurement Service, miscellaneous costs (33% to 40% of miscellaneous ratio) for the process can be further reduced.
Based on the optimal cross-section library database, you can select the span length by 0.4 m and the height by 0.2 m, making it possible to select various and economical cross-sections compared to synthetic ramen bridges (1 m unit composition).
CASE STUDY_DSA BRIDGE
Keep Final Level
Patent Registered: 10-1620513, Patent Pending: 10-2018-0093524