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为了检验目前我国桥规中按列车活载10％作为设计制动力的规定,作者所在单位结合对旧桥和新桥的检定,进行了一系列制动力试验。 这篇文章讨论的试验是以采用电磁式拾振仪量测墩顶位移时程曲线为基础,用动力学方法分析制动力的作用过程和桥梁相应的动力反应。文中对试验记录作了理论解释,在制动力的大小和时间行程方面获得了定量的结论。 全文分三部分,计一、制动力的确定;二、多孔简支梁桥的制动力反应:(一)动力计算简图的研究;(二)计算公式;(三)试验结果分析;三、结论。本期先刊登第一段及第二段的第(一)部分,其余部分下期续登。
In order to test the provisions of our country’s bridge gauge according to the live load of 10% as the design braking force, the author’s unit combined with the test of Old Bridge and Newbridge, carried out a series of braking force test. The test discussed in this article is based on the measurement of the displacement curve at the top of piers by electromagnetic pickup, and analyzes the action of braking force and the corresponding dynamic response of the bridge by dynamic method. The paper gives a theoretical explanation of the experimental records, and obtains the quantitative conclusions in terms of braking force and time travel. The full text is divided into three parts, the first one, the determination of braking force; Second, the dynamic response of the porous simply supported beam bridge: (a) study of dynamic calculation diagram; (two) calculation formula; (three) test results analysis; in conclusion. In this issue, the first paragraph of the first paragraph and the first paragraph of the second paragraph, the rest of the next paragraph.