| Title |
Validity of Plastic-Hinge Models Related to Design Equation for Special Boundary Element |
| Authors |
Lee Sang-Sup ; Bae Kyu-Woong |
| Keywords |
Boundary Elements ; Special Shear Wall ; Plastic Hinge ; Curvature ; Lateral Displacement |
| Abstract |
The purpose of this paper is to assess the validity of simplified plastic-hinge model which was a background of the displacement-based design equation of boundary elements in ACI318-99 provisions. The plastic-hinge models that could describe the relationship between the top displacement and the curvature at the base of the wall were investigated including Wallace2002 model, Wallace2004 model and Englekirk model. Wallace2002 model is a basis of the displacement-based design equation of boundary elements, but Wallace2004 model and Englekirk model are known for making a more accurate estimation. To evaluate accuracy of Wallace2002 model, the results for the top displacement and the neutral axis depth of wall computing from each model were compared. In the process, it was found that the aspect ratio has effects on the results, so the influence of aspect ratio on Wallace2002 model and Wallace2004 model was examined. Then, the proper aspect ratio range for which Wallace2002 and Wallace2004 could be valid was presented. These analyses show that Wallace2002 model has a lower level of accuracy at large aspect ratio and large lateral drift ratio. |