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预应力钢绞线及夹片式锚具在我国的发展与应用——预应力锚固区安全探讨之一
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(中国建筑科学研究院 北京 100013)

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冯大斌

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TU757.2

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The development and application of prestressed steel strand and clip anchorage in China -- one of the safety discussions in prestressed anchorage area
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(China Academy of Building Research, Beijing 100013)

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    摘要:

    近几年,我国的高速铁路、高速公路、普通公路铁路、城际铁路、地下铁路以及很多基础建设项目增加很多,预应力混凝土结构用量持续快速增长。预应力张拉锚固体系的生产供应随之大大增加,其中用量最大的当属预应力钢绞线及夹片式锚具,2009年和2010年,中国每年都生产了1.5亿孔夹片式锚具,远超欧美各国。但是,仍存在一些应解决的问题,如:预应力钢绞线的易用性应予提高,锚具配套件(锚垫板、螺旋筋等)的尺寸应回归到科学的水平,对锚具效率系数的全面观问题,而确保结构物中预应力筋锚固区的安全则是当前最重要的问题。中国的现状已要求将荷载传递试验列入国家产品标准之中,在此预应力工程大发展时期,中国土木程学会混凝土及预应力混凝土分会始终密切关注着预应力张拉锚固体系在工程实践中的表现。

    Abstract:

    In recent years, China's high-speed railways, expressways, ordinary road railways, intercity railways, underground railways and many infrastructure projects have increased a lot, and the use of prestressed concrete structures has continued to grow rapidly. The production and supply of prestressed tension anchoring system has increased greatly, of which the largest use is prestressed steel strand and clip anchorage,2009 and 2010, China produced 150 million holes a year clip anchorage, far more than European and American countries. However, there are still some problems that should be solved, such as: the ease of use of prestressed steel strand should be improved, the size of the anchor kit (anchor plate, spiral bar, etc.) should be returned to the scientific level, the overall view of the efficiency coefficient of the anchor, and to ensure the safety of the prestressed reinforcement anchorage area in the structure is the most important problem at present. The current situation in China has required the load transfer test to be included in the national product standards. In this period of great development of prestressed engineering, the Concrete and Prestressed Concrete Branch of China Civil Engineering Society has always paid close attention to the performance of prestressed tension anchorage system in engineering practice.

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Dabin Feng, Bin Yu, Xiao Pei, Qian Chen, Ying Zhu The development and application of prestressed steel strand and clip anchorage in China -- one of the safety discussions in prestressed anchorage area. Prestress Technology 2012,16(1):3-9. 10.59238/j. pt.2012.01.001

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  • 在线发布日期: 2023-08-06
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