The Influnce Of Embeded Enclosure Wallboard On The Lateral Load Behavior Of Multi-layer Steel Frames

Fabricated steel construction system will definitely be the direction ofdevelopment of the housing industry in the future for its energy conservation, lowconsumption and time-saving, three characteristics. Research on the overall design ofsteel construction is still in its infancy in China. At present, the design of steelstructure is made without regard to the effect of the retaining wall, lackingquantitative research on the lateral load resistance impact of the retaining wall panelon the steel frame.In this paper, based on summarizing the fabricated wall panels and wall nodesmore frequently used both at home and abroad in recent years, a refined finiteelement model with the enclosure wall panels of steel framework is created byintroducing the finite element analysis software ANSYS and wallboard joint stiffnessis worked out through finite element analysis. Considering the contact, rubbing effectand lightweight concrete quality between the wallboards, the numerical results agreewell with the experimental results, and then a further analysis of the synergy of thewall panels and steel frame is made. On this basis, the research on the lateral loadresistance of steel framework with retaining wall panels is systematically carried out,taking into account the influence of changes of several critical factors, axialcompression ratio, span-depth ratio,wallpanel width, thickness and wall openingsform. The results show that when the axial compression ratio changes from0to0.6,compared with the empty frame, bearing capacity and initial rigidity of theinfilled-wallboard steel framework will increase by twice to three times, and theenhancement coefficient will increase linearly with the relatively constant storeyand increasing span-depth ratio. The width of the infilled-wallboard should beselected600mm preferentially. Appropriate rigidity and bearing capacityenhancement coefficient ought to be applied according to different thickness of thewallboards. The impact of the wall openings on the whole structure is relatively lessafter the reinforcement, so it can be neglected when designing.And then a model ofinfilled-wallboard space steel framework is established based on plane frame, theresults of the analysis indicate that whether there are wallboards between horizontalframework or not, the mutual effect is comparatively small, while the longitudinalframework with wallboards has certain effect on the horizontal framework.Finally, without taking the spatial effect into account, the analysis results of planeframe parameter are simplified and the load-displacement curve is divided into threestages: completely elastic period, elastic-plastic period, completely plastic period.Meanwhile, approximate equivalent processing for each stage is made, showing the reference design value of the rigidity and bearing capacity directly. At last, theequivalent spring model and the equivalent poles model are put forward to be thestatic design method for the steel structure housing considering wallboard.