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Deng M.,Xi'an University of Architecture and Technology | Deng M.,Xuzhou Zhongmei Steel Structure Construction Co. | Sun F.,Xi'an University of Architecture and Technology | Sun H.,Xi'an University of Architecture and Technology | And 3 more authors.
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2014

In order to improve the seismic behavior and deformation capacity of steel frame with reinforced concrete infill walls, the experimental study on partially-restrained steel frame with ductile fiber reinfoced-concrete (DFRC) infill wall (SDFRCW) was conducted to study failure mechanism, deformation and energy dissipation capacity capacity. Experimental results indicate that the composite action between steel frame and DFRC infill walls can effectively make use of the tensile strain-hardening behavior with multiple fine cracks, control shear oblique crack development and improve inter-story deformability; crack displacement, yield displacement and peak displacement of specimen obviously increase, which indicates that excellent tensile behavior of DFRC can improve elastic story drift of structure; when SDFRCW specimen fails, it could be made use of excellent energy dissipation capacity and damaged resistance capacity of DFRC shear wall to reduce the plastic deformation of steel frame and to realize the reparability function after strong earthquake. ©, 2014, Science Press. All right reserved.


Sun H.,Xi'an University of Architecture and Technology | Deng M.,Xi'an University of Architecture and Technology | Deng M.,Xuzhou Zhongmei Steel Structure Construction Co. | Sun F.,Xi'an University of Architecture and Technology | And 3 more authors.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2015

In order to improve seismic behavior and deformation capacity of semi-rigid steel frames with RC infill walls (PSRCWs), ductile fiber reinforced-concrete (DFRC) was used to replace conventional reinforced concrete (RC). Test on semi-rigid steel frames with DFRC infill walls (SDFRCWs) was designed and conducted to study the failure mechanism, hysteretic performance, stiffness degradation, ductility and energy dissipation capacity. Comparing the test results with the existing literature, it can be observed that: (1) the excellent tensile behavior and tensile strain-hardening behavior of DFRC can effectively control the development of shear diagonal crack of the infill walls, and achieve a ductile shear damage mode; (2) the crack displacement, yield displacement and ultimate displacement of the SDFRCWs are obviously higher than the PSRCWs, which indicates that the inter-story deformation capacity of the SDFRCW structure can be improved significantly by using the DFRC; (3) when the SDFRCW specimen fails, the wide main diagonal crack has occured in the infill walls of the DFRC, but the wall can maintain the integrity, and the bearing capacity and stiffness of the specimens degrades slowly, which shows that the damaged resistance capacity of the infill walls is significantly improved and the associated repairing expenses after strong earthquakes can be reduced; (4) the SDFRCW structure has good inter-story deformation capacity, which can effectively control the damage in small and medium earthquakes, and can satisfy the requirements of deformation and energy dissipation capacity under large earthquakes. ©, 2015, Editorial Office of China Civil Engineering Journal. All right reserved.

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