COMPARISON STUDY ON THE DYNAMIC RESPONSE OF REINFORCED CONCRETE ABUTMENTS
Keywords:ABAQUS, Abutment, Seismic Response, Real Bridge Model, Wing Wall
Abutment performance suggestively impacts the seismic response of bridge constructions. This research investigates the dynamic performance of reinforced concrete abutments in the actual bridge construction with the consequence of the wing wall and movement constraint. The concrete box girder bridge's analytical model was implemented from the actual bridge in Japan, with the numerical model was performed by a 3D finite element model in ABAQUS software. Four distinct abutment modeling approaches were carried out, including abutment without wing wall as Type 1, an ordinary abutment form in Japan as Type 2, abutment with the entire wing wall as Type 3, and the proposed model Type 4. Comparison study will be taken for different positions of input ground acceleration, which were applied horizontally at the bottom of the pier and abutments as Type A, and at the bottom of the pier as Type B. The input seismic motion was Level 2 Type 2 with ground Type I. The results confirmed that the input seismic ground acceleration position resulted in the different response on shear stress and response stress of abutment. The response stress of abutment with 20 cm of the gap is less than 10 cm. Besides, abutment Type 4 has the capability of resisting the flexural load due to strong ground motion.