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一、混凝土铰在国外的研究及使用概况混凝土铰的研究大概始于本世纪三十年代。1930年德国Hannover、Jesinghaus—Bieligk最早对21个混凝土铰试件进行开裂和破坏荷载试验。同年,西班牙马德里混凝土研究所在Torroja主持下,用砂浆铰试块做了压力和转角试验。1940年美国伊利诺州大学做了混凝土铰的动载试验。1954—1955年,德国Jeske做了大尺寸的混凝土铰试验。1962年德国的Dix,J.研究了混凝土铰在反复压力和弯矩作用时的表现。1967年瑞士做了大型混凝土铰的试验,观察铰在反复转动、反复压力作用下
First, the research and use of concrete hinges in foreign countries Survey of concrete hinges probably began in the 1930s. In 1930, Hannover and Jesinghaus-Bieligk in Germany first conducted cracking and failure load tests on 21 concrete hinged specimens. In the same year, the Madrid Institute for Concrete Research in Spain under the auspices of Torroja used a mortar hinge block to perform pressure and corner tests. In 1940, the University of Illinois at the United States conducted a dynamic load test of concrete hinges. From 1954 to 1955, Jeske of Germany made a large-scale concrete hinge test. In 1962 Germany’s Dix, J. studied the performance of concrete hinges under repeated pressure and bending moments. In 1967, a large-scale concrete hinge was tested in Switzerland. The hinge was observed under repeated rotation and repeated pressure.