通过裂缝特征快速评估桥梁承载能力的试验研究_张文献.pdf

第29 卷第9期 东 北 大 学 学 报 (自 然 科 学 版 ) Vol.29,No.9 2008 年 9 月 Journal of Northeastern University (Natural Science) Sep.2 0 0 8 1 1 1 2 张文献, 刘心亮, 罗　冰 , 李明光 (1. , 　110004;2., 　110005) 　　　:, · , , 5 , · , 、、 , · · , · 　　:;;;;; :U 446.2　　　: 　　　:1005-3026(2008)09-1346-04 Quick Assessment of Loading Capacity of Bridge by Cracking Characteristics 1 1 1 2 ZHAN G Wen -x ian , LI U X in-liang , L UO B ing , L I M ing-g uang (1.School of Resources Civil Engineering, Northeastern University, Shenyang 110004, China;2.Liaoning Provincial Communication Survey and Design Institute, Shenyang 110005, China.Correspondent:ZH NG Wen- xian, E-mail:zwx239 @163.com) Abstract: ccording to the structural cause of flexural crack in a simply-supported reinforced concrete slab bridge, how to assess its loading capacity quickly was investigated experimentally . With 5 rectangular RC slab beams as specimens, the destructive tests were carried out theway the multi-stage concentrated load was exerted at both the tripartite points of the span simultaneously . Then, the relationship was obtained, in between the maximum and mean heightsof cracks, crack width and loading capacity . n empirical formula is thus fitted by means of regression analysis, with a quick assessment of loading capacity of bridge proposed by cracking characteristics. Comparing the values measured with the assessed results, the feasibility and reliability of the proposed method are demonstrated. Key words:reinforced concrete;bri