# Seismic Response Study of L-Shaped Frame Structure with Magnetorheological Dampers
## 6 Conclusions  
In the present study, extensive research about the mechanical performance of the self-made MRD is experimentally studied at different displacement amplitudes and currents. Finally, the main conclusions are summarized as follows:  
1. The damping force provided by the MRD gradually increases with the current, and the adjustable scope of damping force is from 3.1 to 120 kN when the current level increases from 0 to 0.28 A.
2. The programs of the calculation model and time history analysis of the L-shaped frame structure without and with MRDs are proposed, which offers a new way for seismic response analysis of frame structures with MRDs.
3. In contrast with the L-shaped frame structure without MRDs, the three-directional displacement and acceleration, story drift ratio, shear force, and bending moment of each floor of the L-shaped frame structure with MRDs have been significantly decreased.
4. Throughout the duration of seismic waves, the L-shaped frame structure has the obvious response of torsional vibration, and the response of torsional vibration can be controlled by reasonably arranging MRDs in the structure.  
A comparison of the most known machine learning algorithms will be considered in the same scenario for future applications. Moreover, a more comprehensive range of structural systems should be examined to incorporate them into the seismic response methodology.  
Conceptualization, Y.Y., J.Y., Y.F. and X.Z.; methodology, Y.Y., J.Y. and X.Z.; software, Y.Y.; validation, Y.Y., J.Y., Y.F. and X.Z.; formal analysis, Y.F. and X.Z.; investigation, Y.Y. and J.Y.; resources, Y.Y. and J.Y.; data curation, Y.Y., J.Y., Y.F. and X.Z.; writing--original draft preparation, Y.Y.; writing--review and editing, Y.Y., J.Y., Y.F. and X.Z.; visualization, Y.Y. and X.Z.; supervision, X.Z.; project administration, X.Z.; funding acquisition, Y.Y., J.Y., Y.F. and X.Z. All authors have read and agreed to the published version of the manuscript.  
This research is financially supported by the Key R & D and Promotion Projects of Henan Province (202102310239).  
Not applicable.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Floor (Node/Node)**} & \multicolumn{2}{c}{**X Direction**} & \multicolumn{2}{c}{**Y Direction**} \\ \cline{2-6}  & **Without MRDs** & **With MRDs** & **Floor (Node/Node)** & **Without MRDs** & **With MRDs** \\ \hline
1 (27/15) & 1.232 & 0.937 & 1 (18/15) & 1.119 & 1.104 \\
2 (41/29) & 1.237 & 0.974 & 2 (32/29) & 1.133 & 1.121 \\
3 (55/43) & 1.237 & 0.986 & 3 (46/43) & 1.131 & 1.119 \\
4 (69/57) & 1.242 & 0.989 & 4 (60/57) & 1.130 & 1.124 \\
5 (83/71) & 1.247 & 0.988 & 5 (74/71) & 1.128 & 1.125 \\
6 (97/85) & 1.248 & 0.987 & 6 (88/85) & 1.125 & 1.124 \\
7 (111/99) & 1.247 & 0.990 & 7 (105/99) & 1.123 & 1.120 \\
8 (125/113) & 1.246 & 0.993 & 8 (116/113) & 1.122 & 1.116 \\
9 (139/127) & 1.244 & 0.995 & 9 (130/127) & 1.121 & 1.113 \\
10 (153/141) & 1.245 & 0.998 & 10 (144/141) & 1.123 & 1.113 \\ \hline \hline \end{tabular}
\end{table}
Table 6: The maximum horizontal displacement ratios of every floor during the Kobe wave excitation.  
**Data Availability Statement:** Not applicable.  
**Acknowledgments:** This research is financially supported by the Key R & D and Promotion Projects of Henan Province (202102310239). The support is gratefully acknowledged.  
**Conflicts of Interest:** The authors declare that they have no known competing financial interests or personal relationships that could appear to influence the work reported in this paper.