|
Title |
Static Load Tests on Flexural Strength and Crack Serviceability of a Longitudinal Joint for the Slab-Type Precast Modular Bridges
|
|
Authors |
이정미(Jung-mi Lee) ; 이상윤(Sang-Yoon Lee) ; 송재준(Jae-Joon Song) ; 박경훈(Kyung-Hoon Park) |
|
DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.2.137 |
|
Keywords |
슬래브 교량 ; 모듈러교량 ; 연결부 ; 전단키 ; 긴장력 slab bridge ; modular bridge ; joint ; shear key ; prestressing force |
|
Abstract |
The slab-type precast modular bridge consists of the precast slab bridge modules which are connected in the transverse direction. The longitudinal joints between the precast slab bridge modules are filled with cast-in-place mortar. The construction of the slab-type precast modular bridge is completed by applying the prestressing force on the longitudinal joints. In this study, 4-points bending tests and 3-points bending tests were conducted to examine the effects of the prestressing force and the shape of joint on the flexural strength and crack serviceability of longitudinal joint. The results of 4-points bending tests showed that the flexural strength is affected by the prestressing force but not by the shape of join. From the results of 3-points bending tests by which the bending moment and the shear force are simultaneously applied on the joints of the specimens, it is observed that the shape of joint affects on the flexural strength and the crack behavior. The results of two types of bending tests confirmed that the prestressing force according to the design code is appropriate and the joint with two shear keys gives the better performances against the crack of joint.
|