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Title |
Nonlinear Analysis for Negative Moment Distribution of MRS Slab End Joints
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Keywords |
연속구조 ; 더블티 ; 비선형 해석 ; 소성힌지 ; 단부 회전 스프링 continuous connection ; double tee ; nonlinear analysis ; plastic hinge ; rotational end-spring |
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Abstract |
This paper describes an analytical study on the design approach of PC system with continuous connections at member ends. In multi-ribbed moment resisting slab (MRS) system, double tee members are connected continuously over inverted tee beams with the continuous reinforcements placed within topping concrete. Thus, negative moments are concentrated within the narrow connection area. In order to propose a design method, experimental results of the companion study were examined using detailed nonlinear analysis. Then nonlinear static analysis was used to evaluate the partial continuity effect and the moment redistribution mechanism. Material and cross sectional properties were obtained from experimental results of the companion study. Plastic hinge properties for nonlinear static analysis were modeled with cracking moment, nominal moment, corresponding member deformations, etc. The analysis results showed that a large amount of negative moment of MRS slab can be reduced by applying partial continuity and moment redistribution in MRS joint.
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