Comparative Analysis of Seismic Performance of Steel Frame-Rocking Wall Structures with Different Connection Forms of Column Foot
After the rocking wall is introduced into frame structure,the column foot will still undergo a certain degree of plastic damage during earthquakes.Adjusting the column foot to be hinged or uplifted can potentially mitigate these defects.Using the three-story,six-story,and nine-story steel frames as the benchmark models,this study established three kinds of frame-rocking wall structure models with fixed,hinged and uplifted column feet,respectively,followed by dynamic elastoplastic time history analysis.The maximum lateral displacement,inter-story drift,peak acceleration,inter-story shear force,wall shear force,and bending moment of each structure were compared.The comparative mod-el of fixed and hinged energy-dissipating coupling beams was further established to study the effects of coupling beam connection modes on the structure′s seismic performance.The results showed that in the three-story model,fixed column foot achieved optimal control of lateral displacement,inter-story drift,acceleration,inter-story shear force and rocking wall shear force.In the six-story and nine-story models,the best performance was achieved with uplifted and hinged column feet,respectively.The shear force and bending moment diagrams of the rocking wall exhibited"C-shaped"and"reverse C-shaped"patterns,respectively,with the smallest wall bending moment observed when the column foot was fixed,regardless of the number of stories.For energy-dissipating coupling beam,fixed con-nections at both ends were optimal for fixed column foot,while hinged connections at both ends of the energy-dissipating coupling beam were better for hinged and uplifted column feet.This analysis pro-vides a reference for further application and development of steel frame-rocking wall structures.
steel frame-rocking wallcolumn foot formdeformationaccelerationinternal forceconnection form
万方数据
维普
