http://www.iaeme.com/IJCIET/index.asp 200 editor@iaeme.com International Journal of Civil Engineering and Technology (IJCIET) Volume 9, Issue 3, March 2018, pp. 200–220, Article ID: IJCIET_09_03_023 Available online at http://http://www.iaeme.com/ijciet/issues.asp?JType=IJCIET&VType=9&IType=3 ISSN Print: 0976-6308 and ISSN Online: 0976-6316 © IAEME Publication Scopus Indexed EFFECT OF ECCENTRIC LOADING ON FOOTINGS CONNECTED WITH TIE BEAMS Elsamny M.K Civil Engineering Department, Al-Azhar University, Cairo, Egypt Ezz-Eldeen H.A Civil Engineering Department, Al-Azhar University, Cairo, Egypt Elbatal S.A Civil Engineering Department, Al-Azhar University, Cairo, Egypt Elsayed M.M Faculty of Engineering, Sinai University, North Sinai- ElArish-El Masaid, Egypt ABSTRACT The aim of this study is to investigate the effect of thickness and width of tie beams on footings under eccentric loading. The chosen model contains 16 footings connected with tie beams. However the effect of thickness and width of tie beams on vertical and horizontal displacement as well as the contact pressure, moment and shear have been investigated. The footing dimensions are (2.0*2.0) m for corner footings, (2.50*2.50) m for edge footings and (3.0*3.0) m for middle footings). The model contains three critical footings with dimensions as follows: - (2.50 * 1.50) m, (2.0 * 1.0) and (1.0 * 1. 0) m respectively. Isolated footings have fixed depth (D) =0.5m connected with tie beams with variable width (b=0.6D, 0.7D, 0.8D, 0.9D and 1.0D) m and thickness (h=1.0D, 1.5D, 2.0D and 2.5D). A finite element package of the PLAXIS 3D- foundation version 15 has been used to simulate theoretically the model. All of the above assumptions have used with variable depth of footing (Df =0.0D, 0.5D, 1.0D and 1.5D). For eccentric loading it was found that the vertical displacement (settlement) and horizontal displacement under footings connected with tie beams decreases with increasing the thickness and width of tie beams by about (20 to 40)%. The settlement becomes almost uniform along axis and increasing the thickness and width of tie beam decrease the differential settlement. Also it was found that the values of the total normal stress (contact pressure) decrease with increasing width of tie beam and tie beam thickness by about (30 to 40)%. It was also found the bending moment as well as shear force values decrease with increasing the thickness and width of tie beams by about (30 to 40)%. Key words: Tie beam, Settlement, Contact pressure, Plaxis, Finite element, Eccentric, Footing