A study of seismic design and analysis of multi-storey steel plate shear wall buildings
Date Issued
2010
Date
2010
Author(s)
Chu, Chun-Kuei
Abstract
Steel Plate Shear Wall (SPSW) has evolved into an effective lateral force resisting system in recent years. However, the capacity design method for the boundary members has not been fully implemented in the model building codes. The purpose of this research is to develop a convenient and reasonable capacity design procedure for the multi-storey SPSW buildings.
One of the simplified analytical models for the design of SPSW is the equivalent brace (EB) model as it can be conveniently applied for engineering purposes. In order to further promote the appropriate application of the EB model, it becomes a must to investigate its accuracy for any arbitrary SPSW design cases as the EB model may not be able to capture the actual locations of plastic hinges in the vertical or boundary elements. This research conducts the push-over analysis for several SPSW designs with three different aspect ratios using the EB models, and compares the structural responses obtained from the ABAQUS models using shell elements. It is found that the structural response computed from the EB model works reasonable well up to 3% drift, and even when the plastic hinge has formed at the mid-span of the horizontal or vertical boundary elements in the ABAQUS models.
For the purposes of further develop the procedures for a safe and economic design of the first story column, this research proposes a new capacity design method for bottom column which can be applied to avoid the plastic hinge forming at the first story column top. The proposed method is verified using ABAQUS shell element model for six SPSW designs with three different aspect ratios. It is confirmed that the proposed method works well, could prevent the deformation concentration or the weak story to form in 1st story. Finally, following the US seismic design force requirements for SPSW buildings of different stories in Los Angeles, nonlinear response history analyses are conducted in this research using a suite of 20 scaled SAC ground motions on different designs using the PISA3D strip models to investigate the statistical results under the 10/50 level earthquakes. Comparing the dynamic responses with the estimated static maximum demands computed from the static capacity design method, some observations can be summarized as follows:
1. Maximum accumulated panel force contributed to the column axial force is significantly overestimated in lower stories.
2. The dynamic maximum boundary beam end shear can be much greater than the estimated static demand when the panel thicknesses above and below the beam are identical.
3. The maximum accumulated boundary beam end shear may be underestimated in the lower stories.
Subjects
steel plate shear wall
multi-storey
capacity design
seismic design
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-99-R97521215-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):ecab065409a7989ec7540357508e6921