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Title |
Strut-Tie Model Evaluation of Haunch Effects in Concrete Structures
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Keywords |
교각 및 박스 구조물; 헌치부 영향; 헌치부 설계기준; 스트럿-타이 모델; pier and box structrue; haunch effect; haunch design regulations; strut-tie model approach |
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Abstract |
This paper evaluates the effects of haunches and the characteristic differences of haunch design regulations through design of pier and box structures with/without haunches. The design of the pier and box structures was conducted by using the linear elastic plane stress finite element analysis, the DIN 1045 and ACI 318-99 codes, the suggested experimental design equations, and the strut-tie model approach. To prove the validity of design results obtained by the strut-tie model approach, the ultimate strength of two haunched reinforced concrete beams tested to failure was evaluated by using the approach. According to the comparison and evaluation of the design results, it is concluded that the design results of haunched reinforced concrete structures by using conventional and design codes need to be complemented with those by using the strut-tie model approach that reflected the effects of haunches in design comparatively well through the actions of arch and direct transfer of applied loads.
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