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International Concrete Abstracts Portal

Showing 1-5 of 12 Abstracts search results

Document: 

SP250-09

Date: 

March 1, 2008

Author(s):

T. Brockmann and W. Brameshuber

Publication:

Symposium Papers

Volume:

250

Abstract:

As textile-reinforced concrete structures have small but a wide range of wall thicknesses, appropriate specimen sizes and testing procedures need to be defined. The objective of this paper is to derive the mechanical and fracture mechanical characteristics of the newly developed binder systems in relation to the possible size effects. The influence of specimen size and geometry on the compressive and flexural strength was investigated directly by experimental investigations on specimens of different sizes with a size range of 1:8. Subsequently, the results were analyzed with the size effect law (SEL) of Bazant and by means of FE analysis according to the fictitious crack model (FCM) of Hillerborg. Furthermore, the s-e relation for compression and tension as well as the s-w curve for tension were derived as being required for dimensioning TRC structures.

DOI:

10.14359/20144


Document: 

SP250-05

Date: 

March 1, 2008

Author(s):

F. Jesse, N. Will, M. Curbach, and J. Hegger

Publication:

Symposium Papers

Volume:

250

Abstract:

Textile-reinforced concrete (TRC) is a rather new high-performance cementitious composite material. In TRC composites, yarns or rovings from high-performance fibers, such as AR glass and carbon, are processed and oriented in a planar structure. This enables an optimal alignment and arrangement of fibers within structural members and allows for the production of extremely thin concrete components with a high load capacity. This paper gives an overview of some of the most relevant material properties of TRC and the associated mechanisms influencing the mechanical performance of TRC composites.

DOI:

10.14359/20140


Document: 

SP250-10

Date: 

March 1, 2008

Author(s):

H. Cuypers and J. Wastiels

Publication:

Symposium Papers

Volume:

250

Abstract:

Textile-reinforced concrete is an interesting and promising material for thin-walled structural elements. Since sufficient fibers can be included when glass fiber reinforcement is introduced in the form of textiles, a distinct strain-hardening behavior can be obtained beyond the introduction of matrix multiple cracking. However, to improve the range of applications in which this material can be used, stress-strain behavior characteristics and crack control should be globally understood, as well as the parameters influencing them. Both properties are discussed as function of fiber volume fraction, matrix-fiber bundle interface, and the influence of complex fiber-matrix interaction. The constitutive material model that is used in this paper is based on the well-known ACK-theory (Aveston-Cooper-Kelly), but includes the fact that matrix cracking occurs progressively with increasing strength and not at one deterministic stress level.

DOI:

10.14359/20145


Document: 

SP250-01

Date: 

March 1, 2008

Author(s):

H.N. Schneider and I. Bergmann

Publication:

Symposium Papers

Volume:

250

Abstract:

Textile-reinforced concrete (TRC) is a composite material taking advantage of non-corrosive nature of fiber materials such as alkali-resistant glass (AR-glass), carbon, or aramid for designing slender and filigree structural elements. Compared to short cut fibers, textile reinforcement provides a higher degree of effectiveness because the fiber bundles are arranged in the direction of the main tensile stresses. These properties make TRC a promising construction material suitable for a wide range of structural or cladding applications. The material can be produced in plate or panel form, or as a lattice structure, each of these forms requiring different production and connection techniques. This investigation aims at identifying appropriate applications for TRC. These include façade, housing, and load-bearing systems made using slender TRC elements. Geometric and structural modifications are necessary to improve the performance of thin-walled building components made of textile-reinforced concrete. Using selected applications, this paper outlines the main principles of component design in relation to type of load, method of production, and connection details.

DOI:

10.14359/20136


Document: 

SP250-11

Date: 

March 1, 2008

Author(s):

R. Chudoba, B. Möller, K. Meskouris, B. Zastrau, W. Graf, and I. Lepenies

Publication:

Symposium Papers

Volume:

250

Abstract:

Textile-reinforced concrete (TRC) imposes several special requirements on the applicable simulation methods. TRC is highly heterogeneous at several levels of material structures and, therefore, it exhibits a very complex failure process. Examples of interacting effects are the strain localization due to local failure mechanisms in the yarn, bond, and matrix. As a result, except for standard features, the developed models must be able to reproduce discontinuities of the displacement fields, reflect the irregularity of the material structure, special kinematics relations, and the size effect induced either statistically or energetically. This paper reviews the modeling strategies developed and applied in research and development of TRC in the collaborative research centers in Aachen and Dresden.

DOI:

10.14359/20146


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