Thông tin chung
  English
  Đề tài NC khoa học
  Bài báo, báo cáo khoa học
  Hướng dẫn Sau đại học
  Sách và giáo trình
  Các học phần và môn giảng dạy
  Giải thưởng khoa học, Phát minh, sáng chế
  Khen thưởng
  Thông tin khác
  Tài liệu tham khảo
  Hiệu chỉnh
 
Số người truy cập: 106,851,566

 Ultimate Bearing Capacity of Rigid Footing on Sandy Soils for Eccentrically Inclined Load
Tác giả hoặc Nhóm tác giả: Pham Ngoc Quang, Ohtsuka Satoru, and Fukumoto Yutaka
Nơi đăng: 国際会議 4th STI-Gigaku2019; Số: 4;Từ->đến trang: 1-2;Năm: 2019
Lĩnh vực: Chưa xác định; Loại: Báo cáo; Thể loại: Quốc tế
TÓM TẮT
In geotechnical engineering, the stability of a rigid footing under an eccentrically inclined load is an important issue. This is because the number of superstructure building has increased and the situation of structures being subjected to eccentrically inclined loading is occurring more and more frequently. The objective of this paper is to evaluate the bearing capacity of rigid footing on the free surface of sandy soil under the action of eccentric and inclined loads using finite element analysis and assuming that the soil follows the Drucker-Prager’s yield function. In two-dimensional analysis of the footing-soil system, the rigid plastic finite element method (RPFEM) was applied to calculate the ultimate bearing capacity of footing. In computation, an interface element was introduced to simulate the footing-soil system with newly developing the rigid plastic constitutive equation. The footing is considered to be rigid and rough, as it most often is in reality. This study investigated the effect of the internal friction angle of the soil on the load inclination factor iγ and the failure envelope in V-H plane. The results are used to determine value of inclination factor iγ in order to investigate the validity of current design methods. Moreover, the effect of the direction of the horizontal load on the failure envelope in V-H-M space was clarified. Through a series of numerical analyses, new equations are proposed for the load inclination factor iγ, and the limit load space in the normalized vertical load of V/Vult and the normalized horizontal load of H/Vult on sandy soils, where Vult is the ultimate bearing capacity of the centric vertical load. The obtained limit load space was proved to be rational in comparison with those in the literature, such as Meyerhof (1963) [1], Loukidis et al. (2008) [2], and Zheng et al. (2019) [3]. The failure mode of the footing-soil system was shown to be properly computed. Further, the applicability of the obtained limit load space to the load, the vertical, the horizontal and moment loads of which are independently prescribed, was examined. Consequently, the wide applicability to independent vertical, horizontal, and moment loads was clearly shown.
ABSTRACT
In geotechnical engineering, the stability of a rigid footing under an eccentrically inclined load is an important issue. This is because the number of superstructure building has increased and the situation of structures being subjected to eccentrically inclined loading is occurring more and more frequently. The objective of this paper is to evaluate the bearing capacity of rigid footing on the free surface of sandy soil under the action of eccentric and inclined loads using finite element analysis and assuming that the soil follows the Drucker-Prager’s yield function. In two-dimensional analysis of the footing-soil system, the rigid plastic finite element method (RPFEM) was applied to calculate the ultimate bearing capacity of footing. In computation, an interface element was introduced to simulate the footing-soil system with newly developing the rigid plastic constitutive equation. The footing is considered to be rigid and rough, as it most often is in reality. This study investigated the effect of the internal friction angle of the soil on the load inclination factor iγ and the failure envelope in V-H plane. The results are used to determine value of inclination factor iγ in order to investigate the validity of current design methods. Moreover, the effect of the direction of the horizontal load on the failure envelope in V-H-M space was clarified. Through a series of numerical analyses, new equations are proposed for the load inclination factor iγ, and the limit load space in the normalized vertical load of V/Vult and the normalized horizontal load of H/Vult on sandy soils, where Vult is the ultimate bearing capacity of the centric vertical load. The obtained limit load space was proved to be rational in comparison with those in the literature, such as Meyerhof (1963) [1], Loukidis et al. (2008) [2], and Zheng et al. (2019) [3]. The failure mode of the footing-soil system was shown to be properly computed. Further, the applicability of the obtained limit load space to the load, the vertical, the horizontal and moment loads of which are independently prescribed, was examined. Consequently, the wide applicability to independent vertical, horizontal, and moment loads was clearly shown.
© Đại học Đà Nẵng
 
 
Địa chỉ: 41 Lê Duẩn Thành phố Đà Nẵng
Điện thoại: (84) 0236 3822 041 ; Email: dhdn@ac.udn.vn