ABSTRACT
Radical Concrete Technology. Edited by R K Dhir and P C Hewlett. Published in 1996 by E & FN Spon, 2-6 Boundary Row, London SE1 8HN, UK. ISBN 0 419 21480 1. ABSTRACT Combining a new structural design concept and an unique construction scheme, the fast track construction of tall bridge pier is enabled by using a relatively simple site operation. The Hybrid-Slipform Method is intended to be applicable to a high pier structure exceeding 100m. The method has been applied to the piers of 31m and 34m high. The test project has been successful and shown greeter potential of the future deployment. Rapid construction, labor saving, cost competition and safety are major targets of the new method. The structure with hybrid of steel pipe and reinforced concrete also exhibit an advantage of the structural performance under destructive seismic loading, i.e., higher ultimate bending and shear strength as well as significant deformability. As we learned from Hanshin Earthquake Disaster (1995), the composite structure of the new method, which consists of steel pipe and concrete with prestressing strand spiral, is certainly a promising solution for an important tall structure to withstand the devastating dynamic forces. Keywords: Rapid construction, Composite structure, Steel pipe-concrete hybrid, Slipforming, Prestressing strand spiral, Tall bridge pier, Labor saving, Ductility. Dr Kenichi Ukaji is General Manager of Design Department, Obayashi Corporation, Tokyo, and Lecturer in Construction Engineering, University of Saitama and Musa shi Institute of Technology. Mr Keiji Yamagata is Manager of Structural Engineering Division, Japan Highway Public Corporation, and he is responsible of structural aspects in the corporation including research, development, design and construction.
