Enhancing the ability of the square footing to resist positive and negative eccentric-inclined loading using an inclined skirt
Laboratory model tests were performed to investigate the behavior of shallow and inclined skirted foundations placed on sandy soil with R.D%=30 and the extent of the impact of the positive and negative eccentric-inclined loading effect on them. To achieve the experimental tests it was used a box of...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | E3S Web of Conferences |
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| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/64/e3sconf_icgee2023_01020.pdf |
| _version_ | 1827344688177217536 |
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| author | Salah Alhalbusi Ghazwan Al-Saidi A’amal A.H. |
| author_facet | Salah Alhalbusi Ghazwan Al-Saidi A’amal A.H. |
| author_sort | Salah Alhalbusi Ghazwan |
| collection | DOAJ |
| description | Laboratory model tests were performed to investigate the behavior of shallow and inclined skirted foundations placed on sandy soil with R.D%=30 and the extent of the impact of the positive and negative eccentric-inclined loading effect on them. To achieve the experimental tests it was used a box of (600*600)mm cross-sectional and 600mm in height and a square footing of (50*50)mm and 10mm in thickness attached to the skirt with Ds=0.5B and various an angle of (10°,20°,30°). The results showed that using skirts leads to a significant improvement in load-carrying capacity and decreased settlement in addition when the skirt angle increased, the ultimate load improved. load-carrying capacity decreased with increasing eccentricity and load inclination For load inclination (Beta) 15° when the eccentricity changed from e=0.15B to e=0.05B the load improvement percentages were (323.2% to 263%) and (214% to 220%) and settlement reduction factor was (83% to 78%) and (62% to 58%) for positive and negative eccentric-inclined loading, respectively also the result showed the effect of positive on the reduction of soil-bearing capacity is more than negative. Increasing eccentricity increases the improvement percentage for positive eccentric-inclined load and decreases for the case of negative eccentric-inclined load. Increased skirt angle will increase the Improvement factor (IR) When the skirt angle increased from 10° to 30° for an improved foundation with load angles of 5°, 10°, and 15° the improvement factor (IR) increased from (2.53, 2.51, 2.4) to (3.45, 3.65, 3.97) and (2.43, 2.58, 2.54) to (4, 4.63, 5.3) for both negative and positive eccentric-inclined load respectively and settlement reduction factor for load angle 15° and skirt angle increase from 10° to 30° were 34% and 27% for positive and negative eccentric-inclined load respectively. the (IR) for positive eccentric-inclined load is more than the negative eccentric-inclined load for all cases, in addition, the skirt angle of 30° showed a significant improvement in the improvement factor (IR). |
| first_indexed | 2024-03-07T22:51:27Z |
| format | Article |
| id | doaj.art-74c6d264fb4949fa9309743cb021145e |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-03-07T22:51:27Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-74c6d264fb4949fa9309743cb021145e2024-02-23T10:19:31ZengEDP SciencesE3S Web of Conferences2267-12422023-01-014270102010.1051/e3sconf/202342701020e3sconf_icgee2023_01020Enhancing the ability of the square footing to resist positive and negative eccentric-inclined loading using an inclined skirtSalah Alhalbusi Ghazwan0Al-Saidi A’amal A.H.1M.Sc. Candidate, Civil Engineering Department, University of BaghdadProfessor, Civil Engineering Department, University of BaghdadLaboratory model tests were performed to investigate the behavior of shallow and inclined skirted foundations placed on sandy soil with R.D%=30 and the extent of the impact of the positive and negative eccentric-inclined loading effect on them. To achieve the experimental tests it was used a box of (600*600)mm cross-sectional and 600mm in height and a square footing of (50*50)mm and 10mm in thickness attached to the skirt with Ds=0.5B and various an angle of (10°,20°,30°). The results showed that using skirts leads to a significant improvement in load-carrying capacity and decreased settlement in addition when the skirt angle increased, the ultimate load improved. load-carrying capacity decreased with increasing eccentricity and load inclination For load inclination (Beta) 15° when the eccentricity changed from e=0.15B to e=0.05B the load improvement percentages were (323.2% to 263%) and (214% to 220%) and settlement reduction factor was (83% to 78%) and (62% to 58%) for positive and negative eccentric-inclined loading, respectively also the result showed the effect of positive on the reduction of soil-bearing capacity is more than negative. Increasing eccentricity increases the improvement percentage for positive eccentric-inclined load and decreases for the case of negative eccentric-inclined load. Increased skirt angle will increase the Improvement factor (IR) When the skirt angle increased from 10° to 30° for an improved foundation with load angles of 5°, 10°, and 15° the improvement factor (IR) increased from (2.53, 2.51, 2.4) to (3.45, 3.65, 3.97) and (2.43, 2.58, 2.54) to (4, 4.63, 5.3) for both negative and positive eccentric-inclined load respectively and settlement reduction factor for load angle 15° and skirt angle increase from 10° to 30° were 34% and 27% for positive and negative eccentric-inclined load respectively. the (IR) for positive eccentric-inclined load is more than the negative eccentric-inclined load for all cases, in addition, the skirt angle of 30° showed a significant improvement in the improvement factor (IR).https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/64/e3sconf_icgee2023_01020.pdfshallow foundationsandy soilskirted foundationpositive and negative eccentric-inclined loadingskirt inclination angle |
| spellingShingle | Salah Alhalbusi Ghazwan Al-Saidi A’amal A.H. Enhancing the ability of the square footing to resist positive and negative eccentric-inclined loading using an inclined skirt E3S Web of Conferences shallow foundation sandy soil skirted foundation positive and negative eccentric-inclined loading skirt inclination angle |
| title | Enhancing the ability of the square footing to resist positive and negative eccentric-inclined loading using an inclined skirt |
| title_full | Enhancing the ability of the square footing to resist positive and negative eccentric-inclined loading using an inclined skirt |
| title_fullStr | Enhancing the ability of the square footing to resist positive and negative eccentric-inclined loading using an inclined skirt |
| title_full_unstemmed | Enhancing the ability of the square footing to resist positive and negative eccentric-inclined loading using an inclined skirt |
| title_short | Enhancing the ability of the square footing to resist positive and negative eccentric-inclined loading using an inclined skirt |
| title_sort | enhancing the ability of the square footing to resist positive and negative eccentric inclined loading using an inclined skirt |
| topic | shallow foundation sandy soil skirted foundation positive and negative eccentric-inclined loading skirt inclination angle |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/64/e3sconf_icgee2023_01020.pdf |
| work_keys_str_mv | AT salahalhalbusighazwan enhancingtheabilityofthesquarefootingtoresistpositiveandnegativeeccentricinclinedloadingusinganinclinedskirt AT alsaidiaamalah enhancingtheabilityofthesquarefootingtoresistpositiveandnegativeeccentricinclinedloadingusinganinclinedskirt |