Author(s)

Qin Chen ¹

Affiliation(s)

¹ School of Applied Science and Engineering, Fuzhou Institute of Technology, Fuzhou, 350506, China

Corresponding Author

Qin Chen

ABSTRACT

Previous studies have shown that combining swing walls with frame structures to form a new type of frame swing wall can effectively improve the overall seismic performance of the structure. Based on this, this article proposes a new structural form of frame-assembled swing wall, in which the swing wall is vertically assembled by multiple wall pieces and connected to the foundation through unbonded prestressed steel bars to form a whole. A refined numerical analysis model for frame assembled swing wall was established based on the OpenSees numerical platform, and the accuracy of the model was verified through quasi-static tests of the frame structure and assembled swing wall structure. On this basis, combined with dynamic time history analysis, the seismic performance of the frame assembled swing wall was analyzed under different number of assembled wall pieces and different assembly positions. The results show that as the number of wall pieces increases, the stiffness of the frame assembled swing wall decreases to a certain extent, and the bending moment of the assembled wall decreases significantly. For example, when the number of wall pieces is 3, it decreases by 12.38%, and the seismic force under earthquake action is smaller. However, when the number of wall panels increases to 4, the interlayer displacement angle increases, leading to a deterioration in the seismic performance of the structure. Therefore, it is recommended to set the number of assembled wall pieces in the project to 2-3 sections. The analysis results also indicate that when the opening position is far from the weak layer of the frame and set at the lower part of the swinging wall, the interlayer displacement angle of the structural system is smaller, and the interlayer deformation is more uniform.

KEYWORDS

Swingwall; OpenSees; Assemble number; Assembly location

CITE THIS PAPER

Qin Chen, Research on Seismic Performance of Frame-Assembled Swing Wall. Journal of Civil Engineering and Urban Planning (2024) Vol. 6: 149-160. DOI: http://dx.doi.org/10.23977/jceup.2024.060121.

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