Assoc. Prof. Dr. Ahmad Baharuddin ABD RAHMAN

Ahmad BaharuddinAhmad Baharuddin Abd. Rahman is an Associate Professor at the Faculty of Civil Engineering, Universiti Teknologi Malaysia, Skudai, Johor. He obtained his PhD from the University of Sheffield, UK. Before joining UTM, he was a site engineer at Pernas Engineering Sdn. Bhd. where he gained practical experiences in the construction of transmission line towers. He is currently the Academic Manager for External Programme and also the Head of Precast Concrete Research Group (PCRG) at the faculty. His research interests are structural stability and non-linear numerical methods related to multi-storey steel and precast concrete structures. Currently, he is involved with research on the performance of connections for precast concrete components.

The Art of Splice Connections in Precast Concrete Structures

IMG_0977Abstract – In Malaysia, the construction of buildings using prefabricated components or popularly known as Industrialised Building Systems (IBS) has gained acceptance by engineers. The IBS system, in particular the precast concrete building system contributes to sustainability practices by reducing construction waste, optimizing materials and improving the site conditions. The success of precast construction relies on the structural connections between the loose precast concrete components. One of the popular methods of connecting precast components is the use grouted splice connections. The use of grouted splice sleeve connections reduces the anchorage length of connected reinforcement bars and expedites the installation of precast components. This paper discusses the art of grouted splice connections in providing good mechanism of force transfer between structural components in precast concrete structures. In this research work, the grouted splice connection system has undergone rigorous tests in which more than 200 splice specimens were tested experimentally. The good mechanism of force transfer relies on the bond behaviour and the bond-slip relationship. In grouted splice connections, the good bond mechanism is obtained through the ‘confinement and shear action’ to generate the required strength for connecting reinforcement bars in the precast components. The test results show the good performance of the grouted connections for connecting precast concrete components such as wall-to-wall and column-to-column.