The Effects of Infilled Walls on Seismic Performance of RC Frame Structures with Eccentrically Placed Open Corridor
Abstract
:1. Introduction
2. Information of the Model
2.1. Design of the Model
2.2. The Similarity Ratio
2.3. Properties of Materials
2.4. Test System
3. Results and Discussion
3.1. Modal Tests
3.1.1. Natural Frequency
3.1.2. Damping Ratio
3.2. Structural Response in Percussion Test
3.2.1. Reliability of Strain
3.2.2. Internal Force Distribution of Columns
3.3. Structural Seismic Test
3.3.1. Seismic Input
3.3.2. Displacement of Bottom Floor
3.3.3. Strain of the Bottom Column
3.3.4. Structural Damage and Collapse
4. Conclusions
- (1)
- After the infilled wall is installed in the frame, its natural frequency and damping ratio increase significantly.
- (2)
- The form of the infilled wall has a great influence on the lateral stiffness of the structure. The transverse walls in the teaching buildings generally do not have openings, while the longitudinal walls are often provided with doors and windows. Such kinds of spatial arrangements lead to a much greater lateral stiffness in the transverse direction than in the longitudinal direction of this type of structure. Specifically, the transverse fundamental frequency of the frame structure with the infilled wall is about twice that of the vertical one.
- (3)
- When analysing the force and deformation of the frame, its effect of the space with longitudinal and transverse infilled walls should be considered. In general, the stiffness of the transverse infilled wall is very large, which will restrain the transverse deformation of the structure to a certain extent and finally present a deformation translating longitudinally during an earthquake.
- (4)
- At present, the frame with eccentrically placed open corridors, which has “inherent” seismic defects, is mostly adopted in school teaching buildings. The columns with lateral stiffness of a big difference along the longitudinal axis of the structure, especially those constrained by the longitudinal half-height continuous infilled wall, firstly form plastic hinges and lose load-bearing capacity, further resulting in the collapse of the structure.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Variable | Similarity Relation | Similarity Ratio |
---|---|---|
Length | lr | 0.25 |
Elastic modulus | Er | 0.55 |
Equivalent density | ρr = Er/lr | 2.20 |
Stress | δr = Er | 0.55 |
Time | 0.50 | |
Velocity | 0.50 | |
Acceleration | ar = 1 | 1.00 |
Acceleration of gravity | gr = 1 | 1.00 |
Frequency | 2.00 | |
Artificial mass | 12.00 t |
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Wang, B.; Guo, X.; Xuan, Y.; Fan, X.-Q.; Chen, B. The Effects of Infilled Walls on Seismic Performance of RC Frame Structures with Eccentrically Placed Open Corridor. Sustainability 2022, 14, 5299. https://doi.org/10.3390/su14095299
Wang B, Guo X, Xuan Y, Fan X-Q, Chen B. The Effects of Infilled Walls on Seismic Performance of RC Frame Structures with Eccentrically Placed Open Corridor. Sustainability. 2022; 14(9):5299. https://doi.org/10.3390/su14095299
Chicago/Turabian StyleWang, Bo, Xun Guo, Yue Xuan, Xiao-Qing Fan, and Bo Chen. 2022. "The Effects of Infilled Walls on Seismic Performance of RC Frame Structures with Eccentrically Placed Open Corridor" Sustainability 14, no. 9: 5299. https://doi.org/10.3390/su14095299