Thrust 4: Infrastructure Systems & Materials   
Project ID: I3C12406
Feasibility Study on Bendable Concrete Precast Pavement
Principal Investigator: Yang En-Hua (Asst Prof)

JTC Co-Principal Investigator: Kenny Lim
Status:
On- Going

Abstract:
Precast construction provides faster construction as well as higher quality. Similar to many precast elements, the precast pavement panels are fabricated off-site and assembled on-site in order to reduce construction time. In practice, the precast pavement systems are often pre-stressed both in the longitudinal and transverse directions. Individual precast panel is pre-tensioned in the transverse direction (long axis of the panel) during fabrication. After the panels are installed, the pavement system is post-tensioned in the longitudinal direction (the traffic direction). However, pre-stressing is both time and cost consuming. The proposed research is on the development of an innovative precast pavement system which does not require any pre-stressing, thus further reducing construction time with improved productivity to meet the industrialists’ needs.
Project ID: I3C12407
Integrated Structures and Materials Design for Precast Concrete 66kV Substation against Progressive Collapse
Principal Investigator: Tan Kang Hai (Prof)

JTC Co-Principal Investigator: Ng Kian Wee
Status: On- Going

Abstract:
Due to increased power requirements, providing 66kV substations has become the norm for developing many new industrial estates. The physical construction work of a typical 66kV substation takes 15 to 18 months. Precast concrete technology provides possible solution to shorten the physical construction time of 66kV substation. However, current precast concrete building design approach may not be adequate for the development of precast 66kV substation due to the additional requirement of security against threat and vulnerability as 66kV substations are usually regarded as National Critical Infrastructure by the Ministry of Home Affairs. The proposed research is to study the performance of precast concrete beam-column connections under missing column scenarios and to develop high performance precast concrete joints to mitigate the danger of progressive collapse through an innovative integrated structures and materials design (ISMD) approach.

Project ID: I3C13409
Application of Engineering Cementitious Composites (ECC) and Blast Detailing on National Critical Infrastructures against Blast Loading
Principal Investigator: Tan Kang Hai (Assoc Prof)
JTC Co-Principal Investigator: Ng Kian Wee
Status:
On-Going
Abstract:
The project is to numerically investigate the blast resistance of reinforced concrete (RC) elements used in national critical infrastructures. The investigation includes the structural behaviour of RC walls, beams, columns and joints with conventional detailing under blast loading.  Then the numerical simulations will be further extended to study the blast resistance of RC elements with employing blast reinforcement detailing techniques into normal concrete and using engineering cementitous composites replace normal concrete. Based on the comparisons of numerical results, a new concept will be recommended for future infrastructure design against blast loading so as to enhance structural safety in Singapore.