TSC beam, PSRC column, and TSC-PSRC joint

TSC beam, PSRC column, and TSC-PSRC joint

Building use

Factory

Country/Region

South Korea

Overview

By developing innovative patented methods in the construction field (TSC beam, PSRC column, and TSC-PSRC joint), we aim to increase on-site productivity, secure economic efficiency, minimize on-site manpower, and shorten construction periods.

Basic information (construction date, number of stories, gross floor area, adopted design code, engineer(s), Contractor(s), etc.)

Construction date: 2023
Number of stories: 7
Gross floor area: –
Adopted design code: Eurocode
Engineer(s): Sen Engineering Group
Contractor(s): Hyundai Engineering Construction

Issue and/or innovation

With the development of these item, initial fracture of the angle can be prevented, and the bolt shape protruding in the out-of-plane direction of the angle can increase the attachment strength of the concrete-angle by pressure. In addition, high fabrication quality can be maintained in the production of prefabricated columns, and high-strength angles and transverse steel plates can be used when applying high-strength bolts.
In the proposed TSC beam – PSRC column joint method, relatively complex details, such as band plates and wing plates, were used to connect the steel angles of the column and the U-section of the beam. In particular, for fabrication and concrete placement, the flanges of the U-section in the beam were intentionally not connected to the joint. Cyclic loading tests for three full scale connection specimens were performed.

Reason for composite solution

For decreasing construction period and installing long span

Technical details

<TSC Beam>
In this article, a design method of the TSC beam based on Eurocode was introduced, which had been established in an attempt to apply the TSC beam to Singapore. To begin with, a brief introduction to the TSC beam was presented along with its structural performance and fire-resistance performance verified by previous experimental researches. Also, major regulations concerning TSC beams from KBC 2016(1) and Eurocode(4)-(6) were summarized. In designing TSC beams, KBC 2016(1) and Eurocode(4)-(6) are similar in that a composite structure based design is implemented but they differ in many aspects, for example, in terms of the strength reduction factors, the classification system of steel sections and composite sections, the equations for determining the limits of plate width – thickness ratio, and the equations for estimating the flexural strength of the composite section. Going forward, many domestic construction companies are expected to enter not only the Singapore construction market but also numerous construction markets across the globe. To respond to this growing trend, structural engineers in Korea need to equip themselves with the capabilities required to make use of various structural design standards. The authors hope this article will contribute to enhancing the competence of domestic structural design engineers.
<PSRC column>
The present study focused on the structural performance of newly developed prefabricated composite columns (PSRC composite column) using bolt-connected steel angles. Concentric axial loading tests were performed for four 2/3 scaled PSRC column specimens and two conventional SRC column specimens. The test parameters were the spacing and sectional configurations of lateral reinforcement, and width-to-thickness ratio of steel angles. The test results showed that the axial load-carrying capacity and deformation capacity of the PSRC column specimens were comparable to those of the conventional SRC column specimens. Closely spaced steel plates and Z-shaped steel plates for lateral reinforcement increased the deformation capacity of the PSRC column specimens. The load-carrying capacity was greater than the prediction by current design codes. Numerical analysis was performed for the specimens. The results agreed well with the test results in terms of initial stiffness, load-carrying capacity, except for strength degradation due to cover concrete spalling.
<TSC-PSRC joint>
Prefabricated steel–reinforced concrete angle columns and concrete-filled U-shaped steel beams were recently developed for efficient steel-concrete composite construction. In the present study, seismic details of TSC beam–PSRC column connections were developed, taking into consideration constructability and cost efficiency. A cyclic loading test was performed on the beam-column connections to investigate load-carrying capacity, deformation capacity, failure mode, and energy dissipation capacity. For the test parameters, the connection type (interior or exterior) and the depth of the TSC beams were considered. The test results showed that the deformation and energy dissipation capacities of the specimens satisfied the requirements for intermediate moment frames specified in the AISC standard. Further, the moment-carrying capacities predicted using plastic stress distribution were found to be in agreement with the test results. The joint shear capacities of the specimens were evaluated according to ASCE design guidelines.

Specific solution/technical details

The PSRC columns were prefabricated in the factory, which greatly shortened the construction period, and the TSC beams could effectively adapt with the long span of the factory.

Impact or effectiveness

The PSRC columns were prefabricated in the factory, which greatly shortened the construction period, and the TSC beams could effectively adapt with the long span of the factory.

References / Technical Papers Content

Korean Building Code and Commentary Notified by the Ministry of Land, Infrastructure and Transport (2016). Architectural Institute of Korea. 2. ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318-14) (2014). American Concrete Institute. 3. ANSI/AISC 360-16, Specification for Structural Steel Buildings (2016). American Institute of Steel Construction. 4. BS EN 1992 (2004). Eurocode 2. Design of concrete structures. British Standards. 5. BS EN 1993 (2005). Eurocode 3. Design of steel structures, British Standards
Poon, E.D. (1999) Effect of column retrofitting on the seismic response of concrete frames, Dept. of Civil Engineering and Applied Mechanics, McGill Univ., USA.
Montuori, R. and Piluso, V. (2009) Reinforced concrete columns strengthened with angles and battens subjected to eccentric load, Engineering Structures, Elsevier, Vol.31, No.2, pp.539-550.
AIK (Architectural Institute of Korea). (2009). “Korean building code and commentary.” Seoul.
AISC. (2005). “Seismic provisions for structural steel buildings.” ANSI/AISC 341-05, Chicago.
AISC. (2010). “Specification for structural steel building.” ANSI/AISC 360-10, Chicago.
ASCE. (1994). “Guidelines for design of joints between steel beams and reinforced concrete columns.” J. Struct. Eng., 10.1061/(ASCE)0733-9445(1994)120:8(2330), 2330–2357.
AWS (American Welding Society). (1998).
“Structural welding code reinforcing steel.” AWS D1.4, Miami, FL.BSI (British Standards Institution). (2005). “Eurocode 4: Design of composite steel and concrete structures.” London, 90.
https://senkuzo.com/sen/wp-content/uploads/2019/11/Design-Method-of-Thin-Steel-plate-Composite-TSC-Beam-Based-on-Eurocode.pdf
https://doi.org/10.7781/kjoss.2017.29.2.147
https://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0001242