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http://dx.doi.org/10.11112/jksmi.2019.23.3.9

Study on Affecting Factors for the Segmental Joint Behavior of Spliced Girder Bridges  

Nam, Jin-Won (ATECH Solution)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.23, no.3, 2019 , pp. 9-16 More about this Journal
Abstract
Recently, precast PSC girder bridges have been widely applied for short and middle span bridges. The construction of the spliced girder bridges has been increasing to overcome the length limit of girder and transportation restrictions. In case of the spliced girder, the integrity of the segmental joints is very important to secure the structural soundness of bridge because the discontinuity on the segmental joints between adjacent segments could be vulnerable point. The study of segmental joint behavior with different influence factors of joint type, shear key installation, confining force is very important. In this research, finite element analysis and scaled model test with different shear key shapes and confining forces were carried out and the comparative study was performed to evaluate the segmental joint behavior of precast spliced PSC girder bridge. It was confirmed that the installation of shear key with height and depth ratio of 1/2~1/3 and applying of confining force of 1/2 of the concrete strength at the joint was effective in improving the integrity of segmental joint. In addition, the field loading test for existed precast spliced PSC girder bridge was performed and the measurement of the difference of deflection between adjacent segments at segmental joint was proposed as the assessment solution of the integrity of segmental joint.
Keywords
Precast; Spliced girder; Segmental joint; Shear key; Confining force; Finite element analysis; Scaled model test;
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