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Reliability-based Design Of Reinforced Concrete Raft Footings Using Finite Element Method

Submitted2014-08-29
Last Update2014-09-02
TitleReliability-based Design Of Reinforced Concrete Raft Footings Using Finite Element Method
Author(s)Author #1
Author title:
Name: Abubakar Idris
Org: Associate Professor, Department of Civil Engineering, Ahmadu Bello University, Zaria, Nigeria
Country:
Email: idrcivil1@yahoo.com

Author #2
Author title:
Name: Afolayan Joseph Olasehinde
Org: Professor, Department of Civil Engineering, Federal University of Technology, Akure, Nigeria.
Country:
Email: joafol@yahoo.com

Author #3
Author title:
Name: Osinubi Kolawale Jowunlo
Org: Professor, Department of Civil Engineering, Ahmadu Bello University, Zaria, Nigeria
Country:
Email: kosinubi@yahoo.com

Other Author(s)
Contact AuthorAuthor #1
Alt Email: idrcivil1@yahoo.com
Telephone:
KeywordsDesign, Raft footings, BS8110, Reliability, Finite Element Method (FEM)
AbstractIn this study, a FORTRAN-based reliability-based design program was developed for the design of raft footings based on the ultimate and serviceability design requirements of BS8110 (1997). The well-known analysis of plate on elastic foundation using displacement method of analysis was used in conjunction with the design point method. The design point method was adopted for designing to a pre-determined safety level, T. Example of the design of a raft footing is included to demonstrate the simplicity of the procedure. It was found among other findings that there is a saving of about 64% of longitudinal reinforcement applied at the column face using the proposed method as compared with the BS8110 design method. Also, the depth of footing required using the proposed procedure was found to be 47% lower than in the deterministic method using BS8110. Also, considering a target safety index of 3.0 was found to be cheaper than considering a target safety index of 4.0 for the same loading, material and geometrical properties of the footing. It is therefore concluded that the proposed procedure is quite suitable for application.
Paperview paper 2816.pdf (411KB)

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