Hospital / Campus logistic center in Singapore (Outram Community Hospital)

National University of Singapore – Singapore

Hospital / Campus logistic center in Singapore (Outram Community Hospital)

Building use

Hospital

Country/Region

Singapore

Overview

High strength composite columns were adopted to improve productivity and construction speed, and to reduce column footprints.

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

Construction date: 2015-2018
Number of stories: 19
Gross floor area: 146,000m2
Adopted design code: Eurocode
Engineer(s): Arup Singapore Pty Ltd
Contractor(s): Penta-Ocean Construction Co Ltd

Issue and/or innovation

19-Storey building, with four basement levels, located next to a live hospital campus and critical roads used by ambulances.
Site was constrained by railway reserve line restrictions, and soil strata composing of Jurong Formation made excavation challenging.
300m Underground tunnel linking OCH’s basement to an existing basement meandering under structures such as the 100-year-old Bowyer Block, a National Monument of Singapore.

Reason for composite solution

To improve productivity and construction speed, and to reduce column footprints.

Specific solution/technical details

High strength Concrete Encased Rectangular Column – S355 UC356x406x340 with G100 concrete.
Polypropylene fibres were added to the concrete mix to prevent concrete spalling in fire.

Impact or effectiveness

Improve the construction speed and productivity by adopting composite members. Regular steel sections encased in Grade 100 high strength concrete to improve compressive strength. Manhour Savings: Concrete = 25%; Formwork = 13.4%; Rebars = 4.4%; Resource savings: Smaller column size (from 800×1600 to 600×1600)

References / Technical Papers Content

Liew J.Y.R., Xiong M.X., Lai B.L. (2021) Design of steel-concrete composite structures using high-strength materials. Elsevier, ISBN: 978-0-12-823396-2.
Liew J.Y.R., Xiong M.X., Xiong D.X. (2016) Design of concrete filled tubular beam-columns with high strength steel and concrete. Structures 2016; 8: 213-226.