Analysis and Design of Steel Shear Wall Systems [microform]

📖 The Scoop

In the last 15 years a few highrise structures have been successfully completed which employ steel walls to resist lateral loads. These shear walls are formed from thin steel plates which in turn are framed by the beams and columns of the structural system. However, uncertainty still exists as to how the walls should be designed, as very little technical information has been published dealing with suitable methods of analysis. A study was therefore undertaken to review the existing steel shear wall systems and to develop an analytical technique suitable for studying the force transfer in a storey-size steel panel subject to shear. The existing steel shear cores generally employ a series of heavily-reinforced steel panels proportioned to ensure that buckling does not occur in the working load range. This approach is overly conservative for panels not subject to cyclic loads, as it completely neglects the post-buckling strength of a steel panel. An analytical theory which recognizes the contribution of the post-buckling strength of a web to the overall shear resistance has been developed in this report.. A model was developed to represent analytically the resistance provided by the tension zone which arises in a buckled web. The tension zone in the model was represented as a series of inclined truss members, orientated at the same inclination as the diagonal tension stress. Using this model, a series of parametric computer studies were done to examine the influence of various factors on the strength and stiffness characteristics of a shear wall panel. The panel stiffness was found to be uniquely related to panel height, panel length, web thickness, and column stiffness. The stress distribution is not uniform throughout the web and is primarily a function of the column stiffness. The study also showed that the stiffness limits, and not the strength, will usually govern the design of a shear wall panel. The conclusions drawn from the analytical study should be compared with experimental studies of shear wall webs. Further research is needed to develop a procedure to predict the stress distribution in a given web.

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