The Influence Of Floor Stiffness To Frame-supported Shear Wall Structure’s Synergistic Effect

Considering the limited in-plane floor rigidity, horizontal load will cause in-planedeformation of floor slab, and it will make the horizontal load distributed to lateralforce-resisting much different from that is calculated under the assumption of rigidfloor.As to high-rise building with transfer story, because of the discontinuity of lateralforce-resisting, the floor bears large shear force in plane, and produces significantin-plane deformation. In this paper, the change law of shear of frame-supporting columnis discussed when in-plane deformation happens. In this thesis, research status ofhigh-rise building with transfer story is reviewed fist,and related regulations inTechnology Standard of High Rise Concrete Structure Building about transfer storyfloor in order to ensure the floor rigidity is also summarized. Considering shear stiffnessformula, main factors which effect in-plane floor deformation are generalized.The finiteelement models are established by ETABS. Control the in-plane deformation bychanging the width of the building, and the change law of deformation is researched.Furthermore, the variation law of shear of frame-supporting column isanalyzed. The research proves that shear of frame-supporting calculated under theassumption of rigid floor is much larger than that is calculated under the assumption ofelastic floor.Study appears that, the shear force when in-plane deformation of floor happens ismuch larger than the shear force when floor I rigid. Feasible measure which is todecrease the distance between shear walls and increase the number of shear wall linkedwith the ground are put forward. The difference of shear of column between these twoassumptions depends on the in-plane deformation of adjacent floors both.