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Shear Strength Test of Joint with Different Geometric Shapes of Shear Keys between Segments of Precast Segmental Bridge |
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| รหัสดีโอไอ | |
| Creator | Anurak Sangkhon |
| Title | Shear Strength Test of Joint with Different Geometric Shapes of Shear Keys between Segments of Precast Segmental Bridge |
| Contributor | Chaisak Pisitpaibool |
| Publisher | TUENGR Group |
| Publication Year | 2560 |
| Journal Title | International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies |
| Journal Vol. | 8 |
| Journal No. | 1 |
| Page no. | 23-37 |
| Keyword | Single shear key, Multiple shear key, Three shear key, Crack pattern, Trapezoidal shear key, Triangle shear key, Semi-circle shear key |
| URL Website | http://tuengr.com |
| Website title | International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies |
| ISSN | 2228-9860 |
| Abstract | Joints of each segment of a precast concrete segmental bridge are important. A joint is used to transfer internal shear forces in order to increase strength of the structure. A good segmental joint should be a simple shape, cheap cost to set its formwork, and save time for installation. The purpose of this research was to study the capacity of joint with shear-keys that simulated a web segment of a segmental concrete bridge. Three geometric shapes of shear keys were triangle, semi-circle, and trapezoid included sides of 45 degrees. Each sample contained three web panels, which were prestressed together. Two magnitudes of stresses from prestressing forces were taken into account, 0.833-MPa and 1.267-MPa. The shear keys were divided into two types, single and multiple keys (three keys). The results showed that capacity of the joints with trapezoidal were sensitive comparing with the other shapes. Shear strengths of the trapezoidal were significant improved when the number of key and magnitude of prestressing force were increased. With the higher stress (1.267-MPa) and maximum number of shear key (3-key), all of them provided the equivalent ultimate shear strength. However, the triangle and the semi-circle presented the local cracks that might cause a brittle failure at the shear key. |
