Capacity Design of Vertical Boundary Elements in Steel Plate Shear Walls
Capacity Design of Vertical Boundary Elements in Steel Plate Shear Walls
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DOI：
10.62913/engj.v45i1.925
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发表时间：
2008-03
期刊：
影响因子：
--
通讯作者：
J. Berman;M. Bruneau
中科院分区：
文献类型：
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作者：
J. Berman;M. Bruneau
与容量设计原则一致，2005年AISC抗震规定要求，当腹板在地震荷载下屈服时，钢板剪力墙的垂直和水平边界元素应设计为保持基本弹性。然而，确定垂直边界单元的设计荷载以可靠地实现容量设计是困难的，需要一个相当精确的近似过程。本文提出了一种确定钢板剪力墙竖向边界单元设计荷载的方法，从而得到所需构件的屈服顺序。该程序将假定的塑性崩溃机制与垂直边界单元的线性模型相结合，以确定考虑完全屈服的腹板和水平边界单元在其末端铰接的垂直边界单元的最大轴向力、剪切力和力矩。对抗震规定注释中给出的两种承载力设计方法进行了评述，并指出了它们的不足。然后，采用本文提出的方法和现有的两种方法确定了两种不同类型钢板剪力墙竖向边界单元的设计荷载。结果与非线性静力分析结果进行了比较。结果表明，与目前的两种方法相比，该方法所给出的VBE设计载荷更接近于非线性静力分析结果。
Consistent with capacity design principles, the 2005 AISC Seismic Provisions require that the vertical and horizontal boundary elements of steel plate shear walls be designed to remain essentially elastic while the web plates yield under seismic loading. However, determination of the design loads for vertical boundary elements to reliably achieve capacity design is difficult and a reasonably accurate approximate procedure is needed. This paper presents such a procedure for determining those design loads for the vertical boundary elements of steel plate shear walls so that the desired component yielding sequence is achieved. The procedure combines an assumed plastic collapse mechanism with a linear model of a vertical boundary element to determine the maximum axial forces, shear forces, and moments for vertical boundary elements considering fully yielded web plates and horizontal boundary elements hinging at their ends. Two methods for capacity design given in the commentary of the seismic provisions are also reviewed and their shortcomings are identified. Then, design loads for the vertical boundary elements of two different steel plate shear walls are determined with the proposed procedure and the two current procedures. Results are compared with nonlinear static analysis results. The proposed procedure is shown to give VBE design loads that are significantly closer to the nonlinear static analysis results than the two current procedures.