Analysis and Design of Precast Building Systems

Abstract

Prefabricated building system is widely adopted in public buildings as well as in private building projects. Prefabrication together with the standardization and mechanization has brought a substantial change in the development of the construction industry worldwide over last few decades. Recently in India use of prefabrication in building construction is increased. With the adoption of more mechanization, computer aided manufacturing, and intelligent management systems, the extensive use of prefabrication contributed to sustainable development by using cleaner and more resources saving production process. Analysis and design of precast building system requires knowledge of construction practice as well as structural integrity. Precast Concrete Institute (PCI) provides guideline related to precast building system elements design and their connections. PCI handbook is based on the ACI 318 codal provisions. In the present study analysis and design of precast building is presented. The precast building system include precast hollow core slab, precast beam and columns. Different configuration of precast slab, beam and columns are studied. A regular building with 5 storey and 10 storey height is considered. Precast building is analyzed considering dead load, live load, seismic forces, wind forces and their combinations. For modeling and analysis of building STAAD/Pro software is used. Precast structural elements of the building are designed as per PCI and ACI specifications. The connection between slab and beam, beam and column, column and column are designed and detailed. All precast elements are designed considering forces during handling in addition to forces due to gravity load and lateral loading. For design of various precast elements EXCEL sheets are prepared. Comparison of precast building in terms of cost and time of construction with in-situ construction is also presented. Cost of precast building including material, construction cost and handling is presented in the report.