Experimental Study on Flexural Performance of the Prestressed Glulam Continuous Beam after Long-Term Loading
Abstract
:1. Introduction
2. Materials and Methods
2.1. Prestressing System
2.2. Specimen Design
2.3. Test Group
2.4. Loading Scheme and Loading System
3. Results and Discussions
3.1. Failure Modes of Long-Term Beams
3.1.1. Tensile Failure at the Beam Bottom
3.1.2. Compressive Failure at the Beam Top
3.1.3. Overall Instability Failure
3.1.4. Steel Wire Fracture
3.2. Short-Term Beam Failure Modes
3.3. Classification and Analysis of Beam Failure Modes
4. Analysis and Discuss
4.1. Ultimate Load
4.2. Load–Displacement Relationships
4.3. Cross-Section Strain Distribution
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Group A | Group B | ||||
---|---|---|---|---|---|
Beam | Number of Prestressed Steel Wires (Roots) | Prestressed Value (kN) | Beam | Number of Prestressed Steel Wires (Roots) | Prestressed Value (kN) |
LA1-1 | 2 | 7 | LB1-1 | 4 | 0 |
LA1-2 | LB1-2 | ||||
LA2-1 * | 4 | LB2-1 * | 7 | ||
LA2-2 * | LB2-2 * | ||||
LA3-1 | 6 | LB3-1 | 14 | ||
LA3-2 | LB3-2 |
Grouping | Beam | Left Span | Right Span |
---|---|---|---|
Short-term beam | LA1 | I | I |
LB1 | III | II | |
LA2/LB2 | III | II | |
LA3 | I | I | |
LB3 | (-) | I | |
Long-term beam | LA1-1 | IV | (-) |
LB1-1 | (-) | III | |
LA2-1/LB2-1 | I | (-) | |
LA3-1 | (-) | II | |
LB3-1 | (-) | I | |
Regulated beam | LA1-2 | IV | I |
LB1-2 | (-) | III | |
LA2-2/LB2-2 | (-) | II | |
LA3-2 | I | I | |
LB3-2 | I | II |
Grouping | Beam | Prestressed Value (kN) | Number of Steel Wire (Root) | Ultimate Load (kN) | Change in Carrying Capacity (%) |
---|---|---|---|---|---|
Group A | LA1-1 | 7 | 2 | 42.12 | −37.6 |
LA1 | 67.55 | ||||
LA2-1 | 4 | 65.12 | −19.9 | ||
LA2 | 81.26 | ||||
LA3-1 | 6 | 76.25 | −13.5 | ||
LA3 | 88.16 | ||||
Group B | LB1-1 | 0 | 4 | 56.36 | −29.0 |
LB1 | 79.36 | ||||
LB2-1 | 7 | 65.12 | −19.9 | ||
LB2 | 81.26 | ||||
LB3-1 | 14 | 63.27 | −25.1 | ||
LB3 | 84.51 |
Grouping | Beam | Prestress Value (kN) | Number of Steel Wire (Root) | Ultimate Load (kN) | Change in Carrying Capacity (%) |
---|---|---|---|---|---|
Group A | LA1-2 | 7 | 2 | 74.76 | 10.7 |
LA1 | 67.55 | ||||
LA2-2 | 4 | 109.35 | 34.6 | ||
LA2 | 81.26 | ||||
LA3-2 | 6 | 127.65 | 44.8 | ||
LA3 | 88.16 | ||||
Group B | LB1-2 | 0 | 4 | 100.69 | 26.9 |
LB1 | 79.36 | ||||
LB2-2 | 7 | 109.35 | 34.6 | ||
LB2 | 81.26 | ||||
LB3-2 | 14 | 123.73 | 46.4 | ||
LB3 | 84.51 |
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Guo, N.; Zhang, Y.; Mei, L.; Zhao, Y. Experimental Study on Flexural Performance of the Prestressed Glulam Continuous Beam after Long-Term Loading. Buildings 2022, 12, 895. https://doi.org/10.3390/buildings12070895
Guo N, Zhang Y, Mei L, Zhao Y. Experimental Study on Flexural Performance of the Prestressed Glulam Continuous Beam after Long-Term Loading. Buildings. 2022; 12(7):895. https://doi.org/10.3390/buildings12070895
Chicago/Turabian StyleGuo, Nan, Yunan Zhang, Lidan Mei, and Yan Zhao. 2022. "Experimental Study on Flexural Performance of the Prestressed Glulam Continuous Beam after Long-Term Loading" Buildings 12, no. 7: 895. https://doi.org/10.3390/buildings12070895