|Table of Contents|

Finite Element Analysis for Punching Shear Performance of Beam-slab Type Raft Foundation(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2009年02期
Page:
98-102
Research Field:
Publishing date:
2009-06-20

Info

Title:
Finite Element Analysis for Punching Shear Performance of Beam-slab Type Raft Foundation
Author(s):
DU Yong-feng1; 2;  QIU Zhi-tao2
1. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, Gansu, China; 2. Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou 730050, Gansu, China
Keywords:
beam-slab type raft foundation;  punching shear performance;  finite element analysis;  nonlinear;  punching shear bearing capacity
PACS:
TU471.1
DOI:
-
Abstract:
Using ADINA finite element software to carry on punching shear imitation and nonlinear analysis for single-span beam-slab type raft foundation, the fracture, the deformation as well as the distribution of foundation reaction force of the raft foundation were got. The results show that under the small load, the distribution of foundation reaction force of the raft is homogeneous, but with the increase of load, the foundation reaction force presents as nonlinear and concentrates on rib beam and its surrounding 2.5 times plate thick scope. The board and rib beam both represent the phenomenon of inverse bending. In the punching shear calculation, considering board punching shear destructive mode and node destructive mode, and taking the worst-case value as punching shear bearing capacity of the raft. The numerical simulation results can be used as theoretical basis for structural design and model test of this type of raft foundation.

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Last Update: 2009-06-20