| Semi Rigid Connection Steel Frame with Steel Plate Sheer Wall (SRSW) isconsidered as a new type of aseismatic structure, which combines advantages of semirigid connection steel frame and steel plate sheer wall, showing merits such asmulti-defence system of earthquake-resistant, easy construction, substantial ductilityand high-efficiency utilization of materials. However，the Semi-Rigid Connection SteelFrame with Unstiffened thin Steel Plate Shear Walls (SRUSW) has some the defects ofmechanical performance and serviceability, mainly including the noise and tremor ofpanels，the shrinkage of hysteretic loop and unfavorable effects on the adjacentcolumns etc. In order to overcome these shortcomings, the semi-rigid frames withunbonded buckling-restrained wall are combined, forming a new system of theSemi-Rigid Connection Steel Frame with Buckling-Restrained Steel Plate Shear Walls(SRBRP). The buckling-restrained element could improve the force condition of steelpanels, prevent the out-of-panel deformation of steel panels, further improve the seismicperformance and serviceability of the structure, distinct lower the requirement ofductility and stress of the joints, substantially decrease unfavorable effects on theadjacent columns, effectively avoid the traditional welding stiffener and out-of-planeconstraint component of combined steel plate shear wall premature destruction, andthrough control the tension-field proportion, rational quantification ratio of energy andductility, obtain the best way to coordinate the energy dissipation and ductility. It showsa good application prospect in earthquake area.This paper systematically studies the characteristics of SRSW, including internalconversion mechanism, failure mode and energy dissipation mechanism, analyses theinteraction of frame and steel plate wall; assesses the performance of the dual system;explored the influence of out-of-plane restraint stiffness, discusses the performance ofsurrounding column and steel wall. The main works are listed as follows: （1）The pseudo-static test of four two-storey single-span were tested, includingone kind of SRUSW and three kinds of SRBRP, from the aspects of energy dissipationcapacity, ductility, bearing capacity, lateral stiffness, deformation, stress distribution,collaborative work mechanism, analyzing the internal force conversion and the energydissipation mechanism of this structure. The results show that effect of cleading on theframe is obvious, which could decrease the weakening effect of semi-rigid frame on thewhole structure, and improve lateral bearing ability of the frame. The semi-rigidconnection steel framework undertakes25%of overall lateral load and the infill walltakes75%.（2） The experimental results of SRUSW were compared with the SRBRP. Thebuckling-restrained element could improve the force condition of steel panels, increasethe stiffness and bearing capacity of panels, lighten the shrinkage of hysteretic loop andreduce the noise and tremor of panels. The results demonstrate that the SRBRP couldshow superior performance and its unfavorable effects on the adjacent columns aresubstantially decreased. The deflection amplitude of column could be decreased by60%comparing to the SRUSW.（3）Using theANSYS to simulate the dual system, the performance of four kindsof object structures are analyzed under the cyclic loading, comparing with the testresults, which shows that the finite element simulations the seismic performance anddeflection modes results are consistent with the experimental phenomena. In a word, thefinite element result is consistent with the test, which is an effective numerical analysismethod.（4）According to the component method to determine the moment-rotationrelationship of the test connection joint. And validity of various power function modelsis confirmed. Using ANSYS to simulate structures, the whole structural behavior areanalyzed with three joint kinds of the rigid, the semi-rigid and hinge connection. Theresults show that setting up infilled plate could effectively reduce the ductility and stressrequirement of connection. In the semi-rigid frame, joint rotation capacity of SRUSWcould be decreased by more than65%and SRBRP could be decreased by95%.In theelastic stage, the change of joint rigid has little effect on the bearing capacity of SPSW.The framework, as the second line of defense, provides significant effective support, sothe different joint stiffness leads to the differences of the ultimate bearing capacity ofstructure.（5）Using the orthogonal test table to analyses the main influence factors of the connection properties on the dual system, by the single-layer single-span model. Usingsingle-layer single-span, four-layer single-span, four-layer three-span and four-layerseven-span models to analyses the performance requirements of the dual system. Theresult shows that the influence of joint connection characteristics on the bearingcapacity is related to the distribution ratios of the lateral stiffness. When ratios of thelateral stiffness is below20%, the increases of bearing capacity of system is below15%,meanwhile satisfying the requirement of unstability modes of braced steel frames. Theframe of SRSW can be simplified as a hinge connection model. Lateral resistant abilityof framework is considered as the structure safety.（6）Using two kinds of evaluation methodologies, proving the applicability oflimitation of column flexibility according to the CAN/CSA S16-01specification. Theresults show that the test specimen with higher height to width ratio is much harder tomeet the requirement. Combining the concepts of equivalent negative stiffness andtension-field proportion to obtain the limitation of column flexibility under the axialcompression and shear loading. When under the vertical loading, axial compressionratio should be controlled under0.3. Using energy method obtains the stability analysismethod of SRUSW and SRBRP. The results show that when limitation of columnflexibility under2.1, the stability of in plane could be guaranteed, but out-of-planeshould be reconsidered.（7）A new kind of specific detail connection management was applied in theSRBRP specimen, whose efficiency was validated in the experiment. According to thetheoretical analysis gives the limitation of rigidity restrainer. Using ANSYS simulateand analysis the influences of connection of plate and restrainer, bolt distribution,restrainer distribution on the energy dissipation and lateral bearing capacity of structure.Through the analysis of stress mechanism of structure, obtain the best way to coordinatethe energy dissipation and ductility. Though theoretical derivation to obtain the edgedistance requirement of restrainer. |
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