Dynamic Properties of Timber–Concrete Composite Beams with Crossed Inclined Coach Screw Connections: Experimental and Theoretical Investigations
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.1.1. Timber
2.1.2. Concrete
2.1.3. Steel
2.2. Specimens
2.2.1. Shear Connectors
2.2.2. Timber–Concrete Composite (TCC) Beams
2.3. Test Set-Up
2.4. Equipment and Experimental Procedure
3. Experimental Results
3.1. Push-Out Test of Connectors
3.2. Dynamic and Bending Test of the TCC Beams
4. Analytical Investigation
4.1. Theoretical Calculation
4.2. Discussion
4.2.1. Fundamental Frequency
4.2.2. Effect of the Dimensions of Concrete Slabs
4.2.3. Effect of the Connection
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Properties | Et (MPa) | fcl (MPa) | ftl (MPa) | ftp (MPa) |
---|---|---|---|---|
Value | 13,500 | 38.2 | 39.4 | 9.4 |
Properties | Ec (MPa) | fc (MPa) | ft (MPa) |
---|---|---|---|
Value | 33,000 | 28.3 | 2.5 |
Specimen Code | bc/l | bc (mm) | hc (mm) | Connector |
---|---|---|---|---|
TCC0.2 | 0.2 | 930 | 100 | CBIS16-200 |
TCC0.3 | 0.3 | 1395 | 100 | CBIS16-200 |
TCC0.4 | 0.4 | 1860 | 100 | CBIS16-200 |
TCC0.4-CO12 | 0.4 | 1860 | 100 | CBIS12-200 |
TCC0.4-hc120 | 0.4 | 1860 | 120 | CBIS16-200 |
Connector Code | Screw Diameter (mm) | Screw Length (mm) | Penetration Depth (mm) | Ks (kN/mm) | Ku (kN/mm) | Fmax (kN) |
---|---|---|---|---|---|---|
CBIS16-200 | 16 | 200 | 135 | 42.92 | 39.31 | 73.50 |
CBIS12-200 | 12 | 200 | 135 | 40.54 | 34.30 | 58.40 |
Specimen Code | (EI)(exp) (×1012 N⋅mm) | Pu (kN) | d (mm) | f1(exp) (Hz) | ζ1 (%) |
---|---|---|---|---|---|
TCC0.2 | 25.6 | 313.7 | 9.3 | 25.60 | 2.9 |
TCC0.3 | 27.4 | 310.6 | 8.5 | 21.85 | 2.7 |
TCC0.4 | 28.8 | 316.7 | 8.3 | 19.54 | 2.2 |
TCC0.4-CO12 | 28.2 | 273.2 | 7.1 | 19.04 | 2.8 |
TCC0.4-hc120 | 28.3 | 242.2 | 6.6 | 18.07 | 2.1 |
Specimen Code | (EI)eff (×1012 N·mm) | (EI)(exp) (×1012 N·mm) | f1(EC5) (Hz) | f′1(EC5) (Hz) | f1(M) (Hz) | f′1(M) (Hz) | f1(exp) (Hz) | ζ1 (%) |
---|---|---|---|---|---|---|---|---|
TCC0.2 | 26.5 | 25.6 | 23.08 | 23.71 | 22.85 | 23.47 | 25.60 | 2.9 |
TCC0.3 | 28.1 | 27.4 | 19.78 | 20.23 | 19.58 | 20.11 | 21.85 | 2.7 |
TCC0.4 | 29.5 | 28.8 | 17.74 | 18.21 | 17.56 | 18.03 | 19.54 | 2.2 |
TCC0.4-CO12 | 29.0 | 28.2 | 17.58 | 17.25 | 17.40 | 17.08 | 19.04 | 2.8 |
TCC0.4-hc120 | 34.5 | 28.3 | 17.58 | 18.02 | 17.40 | 17.84 | 18.07 | 2.1 |
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Wen, B.; Tao, H.; Shi, B.; Yang, H. Dynamic Properties of Timber–Concrete Composite Beams with Crossed Inclined Coach Screw Connections: Experimental and Theoretical Investigations. Buildings 2023, 13, 2268. https://doi.org/10.3390/buildings13092268
Wen B, Tao H, Shi B, Yang H. Dynamic Properties of Timber–Concrete Composite Beams with Crossed Inclined Coach Screw Connections: Experimental and Theoretical Investigations. Buildings. 2023; 13(9):2268. https://doi.org/10.3390/buildings13092268
Chicago/Turabian StyleWen, Bo, Haotian Tao, Benkai Shi, and Huifeng Yang. 2023. "Dynamic Properties of Timber–Concrete Composite Beams with Crossed Inclined Coach Screw Connections: Experimental and Theoretical Investigations" Buildings 13, no. 9: 2268. https://doi.org/10.3390/buildings13092268