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The 4th ACF International Conference Report

The 4th ACF International Conference Report

Department of Engineering Mechanics and Energy
Kanakubo Laboratory

Wei Zhang

With the rapid development of countries in Asian and neighboring region in recent decade, infrastructure development is at the hub of economic and engineering activities. There is a growing sense of co-operation between these countries particularly in the development and construction sectors. These involve the sharing of expertise and experience. Concrete is the single most common material being used in these constructers. The social, cultural, environmental and technological background of these countries, though diverse, is different from that of their western counterparts. Therefore, it is thought expedient to formulate a gathering organization for discussion and information sharing of research, design, construction and maintenance of concrete structures commensurate with the needs, practices and aspirations of these countries. The Asia Concrete Federation is formed, with representatives of countries in the Asian and neighboring region, entrusted with the task of preparation and maintenance of concrete structures as well as provision of services to the society through concrete structures.

The 4th ACF International Conference had been held in Taipei, Taiwan during November 29 ~ December 1, 2010. The theme of the conference is "Concrete for Sustainable Engineering", aiming to promote and advance the science and practice of Concrete Engineering and related professions for sustainable developments in the Asian region. There was keynote speech, invited lectures, parallel sessions, and special forums in technical program.

In this conference, I had presented my paper about “Bond Behavior between CFRP Plate and Concrete under Fatigue Load”. The abstract is that Rehabilitation or strengthening of existing concrete structures using external attached CFRP (Carbon Fiber-Reinforced Plastic) plate has been developed to extend their life. In these structures, it is frequently necessary not only to augment the existing strength of beams and slabs that have suffered material decay, damage, or an increase of service load, but also to provide sufficient durability to prevent failure from fatigue. Repeated loading can cause the failure by fatigue even if the loading ranges are considerably less than their ultimate capacity. In recent, many studies have reported a variety of FRP debonding problems. Although the bonding and debonding mechanisms of CFRP sheets under static loading have been quite extensively studied, until now, the study of CFRP plate bond behavior under fatigue loading has rarely been carried out. For strengthening structures, the evaluation of fatigue performances is considered to be a very important one. Based on these considerations, this paper aims at investigating clearly the bond behavior of CFRP plates bonded to concrete under fatigue loading.

The fatigue loading test for double-face bond specimens is carried out. According to the experiment results to investigate the influence of bond behavior with different concrete strength, types of CFRP plate and variables of maximum fatigue load, the fatigue behavior of bonding surface between CFRP plates and concrete is finally characterized by the conducted S–N diagram representing the relationship among the average bond stress and the number of cycles at debonding on a semi-logarithmic scale. The different debonding modes for various fracturing are also investigated and evaluated.

I have been born in Urumqi of Xinjiang Uygur Autonomous Region of China. Xinjiang covers 16% of the total land area of China and is populated by 13 of China's 55 minority nationalities. Of the total population of 11 nationalities, who favor dressing in costumes, have distinct cultural traditions. Other prominent nationalities of this region are ethnic Chinese, Kazaks, and Hui. Urumqi is the capital of the Xinjiang Uygur Autonomous Region, China's most western province. The most "inland" city in the world - the furthest from any major body of water - Urumqi is 3,270 km. (2,050 miles) from Beijing (a five-hour flight). With a population of one million, the city lies as a green-blanketed oasis amidst Xinjiang's barren and uninhabited deserts, loess highlands, and the snowcapped peaks of the Heavenly Mountain.

When I have finished my bachelor study in China, and selected the University of Tsukuba to go on my graduated study. That is because the University of Tsukuba is located in the city of Tsukuba, Ibaraki Prefecture in the Kanto region of Japan. Tsukuba Science City represents one of the world's largest coordinated attempts to accelerate the rate of and improve the quality of scientific discovery. Nearly half of Japan's public research and development budget has been spent in Tsukuba. Tsukuba has become one of the world's key sites for government-industry collaborations in basic research.

During 3 years, I have studied in High Performances Concrete Structures Laboratory (Kanakubo Lab) of Department of Engineering Mechanics and Energy in Graduate School of Systems and Information Engineering. And major in about Bond between FRP Plate and Concrete research. Until March 2011, I have finished my graduated study. And I will go on my doctor study. In the future, I hope to be a professional specialist to contribute for China and Japan.

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