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International Concrete Abstracts Portal

The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

Showing 1-5 of 11 Abstracts search results

Document: 

SP152

Date: 

March 1, 1995

Author(s):

Editor: Edward J. Ulrich

Publication:

Symposium Papers

Volume:

152

Abstract:

SP152 Design and Performance of Mat Foundations is the first state-of-the-art review. Within its 267 pages, you will find informative papers dealing with mat foundations and its interaction with the superstructure, design considerations for soil-structure interaction problems, subgrade reaction, subgrade modeling, foundations for tall buildings, mass concrete pour techniques for the mat foundation geotechnical-structural interactions for innovative mat design, and large mat on deep compressible soil. Obtain your copy of SP-152 and see how the science has progressed to the use of present day technological advances. All captured in the 10 technical papers from distinguished international engineers.

DOI:

10.14359/14192

Document: 

SP152-06

Date: 

March 1, 1995

Author(s):

G. J. Tamaro and A. H. Brand

Publication:

Symposium Papers

Volume:

152

Abstract:

The MesseTurm, the tower at the fairground in Frankfurt am Main, Germany, is Europe's tallest high-rise building. It is 256 m (840 ft) tall and rests on a combination mat and bored pile foundation bearing in Frankfurt clay. This paper describes the foundation design and construction. Load and settlement monitoring devices were installed; the measurement results obtained during and after construction are presented. The effect of a post-construction 12-m (40-ft) groundwater lowering on the behavior of the foundations is shown.

DOI:

10.14359/1557

Document: 

SP152-07

Date: 

March 1, 1995

Author(s):

A. R. Dar

Publication:

Symposium Papers

Volume:

152

Abstract:

In large concrete pours, the heat of hydration, which continues to build for several days, is a major cause of concern for structural engineers. As the surface of concrete cools off, a thermal gradient is formed across the concrete section which can cause the concrete to crack. This paper verifies that by keeping concrete warm and preventing heat from escaping rapidly, the temperature difference within the mass can be minimized, thus reducing the potential for thermal cracking. Use of this technique made possible the largest monolithic mat foundation pour in Hawaii, without construction joints and without artificial cooling of concrete.

DOI:

10.14359/1558

Document: 

SP152-01

Date: 

March 1, 1995

Author(s):

E. J. Ulrich, JR.

Publication:

Symposium Papers

Volume:

152

Abstract:

Subgrade response is the most important parameter in analyzing and designing mat foundations. Rational design of a mat foundation requires consideration of immediate and long term subgrade response. The soil response determines mat behavior, and differential movement exacerbates moments. Often, long term movement provides the most severe mat behavior characteristics. The popular use of a single modulus of subgrade reaction k, to model subgrade response is wrong and will lead to wrong designs. Mat analysis and design should be performed using the discrete area method, in which subgrade responses can be properly modeled because of the use of varying moduli of subgrade reaction. The geotechnical engineer and the structural engineer must form a solid bond to cope with mat foundation design from early planning through construction; both must work together to assure successful performance. Often, construction details and procedures will govern performance and can ruin any analysis. For this reason, the geotechnical engineer should be on site accessing conditions.

DOI:

10.14359/1519

Document: 

SP152-03

Date: 

March 1, 1995

Author(s):

J. F. Horvilleur and V. B. Patel

Publication:

Symposium Papers

Volume:

152

Abstract:

Reviews methods used in preliminary design of mat foundations, as well as procedures used in final analysis and design. Emphasis is placed on the effect that different structural and soil properties have on mat design bending moments and pressure distribution. Using results of parametric studies on two actual mat foundations, the sensitivity of mat moments and pressure distribution to changes in design parameters is investigated. The soil-dishing phenomena and its effect on mat structural design is discussed. The effect that superstructure stiffness has on mat behavior and the effect that differential settlement within the mat has in the superstructure are also presented and discussed. Finally, specific recommendations are provided regarding selection of proper structural and soil properties to be used in analysis and design of foundation mats.

DOI:

10.14359/1522

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