文章基本信息

标题：Upon the Stresses Developed in the Superstructure Influenced by Limited Excavation and Concreting Works Underneath an Existing Foundation
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作者：Maria Solonaru ; Irina Lungu ; Mihai Budescu 等
期刊名称：Bulletin of the Polytechnic Institute of Jassy, Constructions, Architechture Section
印刷版ISSN：1224-3884
电子版ISSN：2068-4762
出版年度：2016
卷号：66
期号：2
页码：19-28
出版社：Gheorghe Asachi Technical University of Jassy
摘要：Underpinning of foundations is a method utilized on large scale with the purpose of strengthening the foundations of an existing building. Traditional underpinning consists in excavated alternate pits afterwards filled with poured concrete. The aim of the present paper is focused on the normal stress variation into masonry walls when removing an area of soil from under the center of the foundation and filling it with concrete, with the end purpose of underpinning the foundation. The length of the central section should be adjusted so that the additional stresses induced into the wall on the excavation stage as well as on the concrete casting stage to be tolerated. The model geometry consists of a homogeneous and isotropic layered soil profile, a stone masonry continuous foundation and a brick masonry wall, developed and analyzed in a three-dimensional linear elastic hypothesis with finite element software-ANSYS. The elastic properties of the wall and foundation are framed into a decreasing range of values defining the material aging during service.
关键词：finite element analysis; ANSYS software; section length; dimensional optimization; stress distribution.