Computational Technology Resources - CCP

Keywords: foundation, Khorjini, saddle-like, rehabilitation, strip foundation.

Summary

One of the remedies to strengthen existing buildings is to add either concrete or steel frames to the structure [1]. To execute this design, it is necessary to build foundations that usually will be located under existing walls [2]. Considering the fact that the walls are carrying loads, the addition of foundations beneath the walls in conventional ways is not possible. Thus retrofitting experts have introduced some practical procedures to execute this procedure [1,2]. In most of these procedures, the foundations are built piece by piece separately and then patched to each other. In such cases, in addition to high cost and operational difficulties, the quality of the foundations is poor.

Foroughi proposed a type of foundation called the Khorjini foundation [3] and showed that in addition to simplicity, low cost and high quality, the safety during construction was much higher [4]. In this proposed type of foundation, two parallel strips are built on both sides of the existing wall and they are connected to each other at the column locations. A study done by Sharifia [4], shows the desired functioning of this type of foundations.

In the studies, presented in this paper, the proposed sample foundations are designed by using ETABS [5] based on standard regulations. Then, the foundations are analysed using the finite element method considering material and geometrical nonlinearities by employing SAFE [6] and ANSYS [7]. The whole foundation and a portion of wall having the same depth as foundation are modelled and analysed when subject to cyclic loads. The effect of concrete confinement is also considered. Finally, the proposed foundation is introduced and the practical aspects and behaviour of the foundation are discussed.

References

1: J. Warner, "Handbook of Grouting: Soil, Rock, and Structures", Wiley, 2004.
2: J.E. Bowles, "Foundation Analysis and Design", (4th Edition), Mc Graw Hill International Editions, 1988.
3: M. Foroughi, M. Mousavi, "Study on Behaviour of Khorjini Foundations in Comparison with Strip Foundations", Yazd University, Iran, 2009.
4: M.R. Sharifia, "Study of Nonlinear Behaviour of Khorjini Foundation under Cyclic Loads", MSc Thesis, Yazd University, Iran, 2012.
5: eTABS, "Three Dimensional Analysis of a Building Systems", User Manual, Computers and Structures, Inc., Berkeley, USA, 2000.
6: SAFE Plus W/Detailer Version 8.1.1, "Slab Analysis by the Finite Element Method", Computers and Structures, Inc., Berkeley, USA, 2009.
7: ANSYS 10 "Tutorial (Help)", ANSYS Release 10.0 Documentation, ANSYS Inc, Canonsburg, USA, 2006.

purchase the full-text of this paper (price £20)

go to the previous paper
go to the next paper
return to the table of contents
return to the book description
purchase this book (price £50 +P&P)

	Computational & Technology Resources an online resource for computational, engineering & technology publications
	not logged in - login
Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 100 PROCEEDINGS OF THE EIGHTH INTERNATIONAL CONFERENCE ON ENGINEERING COMPUTATIONAL TECHNOLOGY Edited by: B.H.V. Topping Paper 112 Studying the Behaviour of a Proposed Strip Foundation for Structural Retrofitting M. Foroughi¹ and M.A. Barkhordari² ¹Department of Civil Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran ²Civil Engineering Department, Iran University of Science and Technology, Narmak, Tehran, Iran doi:10.4203/ccp.100.112 purchase the full-text of this paper Full Bibliographic Reference for this paper M. Foroughi, M.A. Barkhordari, "Studying the Behaviour of a Proposed Strip Foundation for Structural Retrofitting", in B.H.V. Topping, (Editor), "Proceedings of the Eighth International Conference on Engineering Computational Technology", Civil-Comp Press, Stirlingshire, UK, Paper 112, 2012. doi:10.4203/ccp.100.112 Keywords: foundation, Khorjini, saddle-like, rehabilitation, strip foundation. Summary One of the remedies to strengthen existing buildings is to add either concrete or steel frames to the structure [1]. To execute this design, it is necessary to build foundations that usually will be located under existing walls [2]. Considering the fact that the walls are carrying loads, the addition of foundations beneath the walls in conventional ways is not possible. Thus retrofitting experts have introduced some practical procedures to execute this procedure [1,2]. In most of these procedures, the foundations are built piece by piece separately and then patched to each other. In such cases, in addition to high cost and operational difficulties, the quality of the foundations is poor. Foroughi proposed a type of foundation called the Khorjini foundation [3] and showed that in addition to simplicity, low cost and high quality, the safety during construction was much higher [4]. In this proposed type of foundation, two parallel strips are built on both sides of the existing wall and they are connected to each other at the column locations. A study done by Sharifia [4], shows the desired functioning of this type of foundations. In the studies, presented in this paper, the proposed sample foundations are designed by using ETABS [5] based on standard regulations. Then, the foundations are analysed using the finite element method considering material and geometrical nonlinearities by employing SAFE [6] and ANSYS [7]. The whole foundation and a portion of wall having the same depth as foundation are modelled and analysed when subject to cyclic loads. The effect of concrete confinement is also considered. Finally, the proposed foundation is introduced and the practical aspects and behaviour of the foundation are discussed. References 1 J. Warner, "Handbook of Grouting: Soil, Rock, and Structures", Wiley, 2004. 2 J.E. Bowles, "Foundation Analysis and Design", (4th Edition), Mc Graw Hill International Editions, 1988. 3 M. Foroughi, M. Mousavi, "Study on Behaviour of Khorjini Foundations in Comparison with Strip Foundations", Yazd University, Iran, 2009. 4 M.R. Sharifia, "Study of Nonlinear Behaviour of Khorjini Foundation under Cyclic Loads", MSc Thesis, Yazd University, Iran, 2012. 5 eTABS, "Three Dimensional Analysis of a Building Systems", User Manual, Computers and Structures, Inc., Berkeley, USA, 2000. 6 SAFE Plus W/Detailer Version 8.1.1, "Slab Analysis by the Finite Element Method", Computers and Structures, Inc., Berkeley, USA, 2009. 7 ANSYS 10 "Tutorial (Help)", ANSYS Release 10.0 Documentation, ANSYS Inc, Canonsburg, USA, 2006. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £50 +P&P)
Back to top	©Civil-Comp Limited 2023 - terms & conditions