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International Concrete Abstracts Portal

Showing 1-5 of 22 Abstracts search results

Document: 

SP176-20

Date: 

October 1, 1998

Author(s):

D. Bull

Publication:

Symposium Papers

Volume:

176

Abstract:

An overview is presented of New Zealand applications and design concepts for the utilization of high strength concrete (concrete compressive strength greater than 55 MPa (8,000 psi)) in various forms of structures that are required to withstand seismic loading. In order to take advantage of the high concrete compressive strengths and enhanced durability designers and researchers are investigating various structural applications. The performance of elements of these structures ranges from remaining elastic during a major seismic event through to being required to exhibit significant ductility in the major events.

DOI:

10.14359/5911


Document: 

SP176-01

Date: 

October 1, 1998

Author(s):

S.L. McCabe

Publication:

Symposium Papers

Volume:

176

Abstract:

Considerations regarding bond and development of reinforcement in high strength concrete (HSC) are presented from a North American perspective. The information contained in this paper is a compilation of information from various sources and represents a survey of the basis for North American approaches to bond of normal and high strength concrete under monotonic and cyclic loading. The paper was presented in part at the Second US-Japan-New Zealand-Canada Multilateral Meeting on the performance of HSC held in Honolulu November 29-December 1,1994.

DOI:

10.14359/5892


Document: 

SP176-21

Date: 

October 1, 1998

Author(s):

P. Mendis

Publication:

Symposium Papers

Volume:

176

Abstract:

This paper discusses briefly, the major applications of high-strength concrete in seismic regions. The advancement of material technology and production has led to higher grades of concrete strengths. These concretes can be produced using conventional production procedures, The use of high-strength concrete is becoming popular in the USA and other countries. The reduced member sizes obtained through the use of high-strength concrete will develop reduced inertial loads under seismic excitation. Strength and ductility are the most important design considerations for a structure to behave satisfactorily under these conditions. These aspects relevant to high-strength concrete members are summarised in the paper.

DOI:

10.14359/5912


Document: 

SP176-02

Date: 

October 1, 1998

Author(s):

S. Fujii, H. Noguchi and S. Morita

Publication:

Symposium Papers

Volume:

176

Abstract:

In this paper, research on bond and anchorage of reinforcement in high strength concrete were reviewed. They were classified to three groups: research on bond capacity with splitting of surrounding concrete, bond deterioration of bars passing through beam-column joints and anchorage capacity of hooked bars in beam-column joints. A characteristic property of low tensile strength relative to the high compressive strength results in a small increase of bond and anchorage capacity if the failure mode is governed by concrete splitting. Transverse reinforcement is more important for high strength concrete. The effect of concrete strength is more for the bond which failed in concrete crushing or direct shearing at the interface, such as the bar passing through the joint. High compressive strength and high rigidity of stress-strain curve makes the local bond-slip curve stiffer. Low sedimentation and low bleeding effects make the top bar effect small. bBfyy By analyzing available research, bond and anchorage capacities were evaluated quantitatively for practical design use.

DOI:

10.14359/5893


Document: 

SP176-07

Date: 

October 1, 1998

Author(s):

C.J. Fasching and C.E. French

Publication:

Symposium Papers

Volume:

176

Abstract:

Flexural behavior of high strength concrete (HSC) beams was investigated based on the experimental work of a number of researchers. The effects of HSC on mechanical properties such as ,modulus of elasticity, tensile strength, limiting concrete compressive strain, and Poisson’s ratio were reviewed. The applicability of current ACI design guidelines and suggested modifications were compared with experimental data in terms of strength, ductility, and serviceability.

DOI:

10.14359/5898


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