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International Concrete Abstracts Portal

Showing 1-5 of 22 Abstracts search results

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: 

SP176-20

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: 

SP176-19

Date: 

October 1, 1998

Author(s):

S. Otani, M. Teshigawara, M. Murakami and T. Okada

Publication:

Symposium Papers

Volume:

176

Abstract:

The increase in the number of high-rise reinforced concrete buildings has accelerated the research on the manufacturing and development of high strength materials. Ministry of Construction, Japanese Government, organized a national research project from 1988 to 1993 for “the Development of Advanced Reinforced Concrete Buildings using High-strength Concrete and Reinforcement.” This paper introduces the earthquake resistant design guidelines developed as a part of this technical project. The scope is limited to the building height of 200 m, the concrete strength of 60 MPa, and the steel strength of 700 MPa.

DOI:

10.14359/5910


Document: 

SP176-18

Date: 

October 1, 1998

Author(s):

LA. Wyllie, Jr.

Publication:

Symposium Papers

Volume:

176

Abstract:

Possible applications of the use of high strength concrete in structures designed to respond to the strong ground shaking of earthquakes is discussed. The basis of the building code requirements is discussed and various limitations are explored. The need for detailing of members to ensure ductility is discussed and how the high stresses that can be present in high strength concrete members will require more stringent confinement reinforcement as well as other detailing procedures. The paper urges caution when designing with high strength concrete in seismic regions.

DOI:

10.14359/5909


Document: 

SP176-17

Date: 

October 1, 1998

Author(s):

F. Watanabe and T. Kabeyasawa

Publication:

Symposium Papers

Volume:

176

Abstract:

The use of high strength concrete has been increasing in the construction of high-rise earthquake resistant buildings in Japan. However, design guidelines have not been fully developed for reinforced concrete buildings with concrete compressive strengths higher than 35.3 MPa. Therefore the Japanese Building Research Institute initiated “New RC Project” aimed at establishing design guidelines for buildings constructed using high strength concrete. The project started in 1988 and extensive research has been conducted at several research institutes and universities. Shear tests on beams and columns with high strength concrete were also conducted as part of program to establish the shear design method for them. This paper summarizes findings from the New RC tests and others on shear strength of reinforced concrete beams and columns with high strength concrete and high strength shear reinforcement. The accuracy of currently available shear strength equations are then examined. The shear design method proposed by the Shear Working Group of the New RC project is also introduced in this paper.

DOI:

10.14359/5908


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