T-profile junction of composite materials

1. A T-profile junction of composite materials comprising:

a T-profile and a base plate,

said T-profile comprising at least a web, and at least two flanges, each of said flanges being angled with respect to said web, a fillet being provided between each of the flanges and the web, said base plate extending at least along most of the surface of the flanges opposite to the web,

at least one tension bar comprising a bridge and at least one fixation opening towards at least one lateral support of said at least one tension bar, said at least one tension bar being releasably mounted to the base plate from the side of said respective web with at least one fastener through the at least one fixation opening of the at least one tension bar,

wherein the web is provided with at least one passage and said at least one tension bar is reaching through said at least one passage, the at least one tension bar being biased against the base plate and the respective flanges of said T-profile by fasteners on either side of said web, said tension bar providing a biasing means for forcing the fillets towards the base plate.

2. The T-profile junction according to claim 1 , wherein the flanges are essentially rectangular with respect to said web.

3. The T-profile junction according to claim 1 , wherein the biasing means further comprises essentially circular support rods positioned between the tension bar and the fillets on either side of the web.

4. The T-profile junction according to claim 3 , wherein the essentially circular support rods have a diameter that is large enough to prevent the tension bar from resting over the flanges.

5. The T-profile junction according to claim 3 , wherein the tension bar is pre-tensioned through compression on the support rods.

6. The T-profile junction according to claim 1 , wherein the biasing means further comprises unidirectional carbon support rods cured in place over the fillet to an essentially oval shape.

7. The T-profile junction according to claim 1 , wherein the biasing means further comprises support rods made from spring steel with a geometry of one of a slotted pin spring and a leaf spring for pre-tensioned support.

8. The T-profile junction according to claim 1 , wherein the biasing means further comprises support pads.

9. The T-profile junction according to claim 8 , wherein the support pads extend beyond the cross section of a bridge of the tension bar.

10. The T-profile junction according to claim 8 , wherein the support pads are formed as square pad or as T-shaped pad on both flanges.

11. The T-profile junction according to claim 8 , wherein the support pads are tapered support pads.

12. The T-profile junction according to claim 1 , wherein the bridge is conceived as biasing means to force support brackets of the tension bar towards the fillets.

13. The T-profile junction according to claim 1 , wherein the passage is formed as a slot with rounded corners to avoid stress concentration, said slot being on the web or partly on the web and partly on the fillet and near to the fasteners carrying pulling loads.

14. The T-profile junction according to claim 1 , further comprising:

support rods positioned between the tension bar and the fillets on either side of the web;

wherein the biasing means further comprise support pads; and

wherein the support rods and/or the support pads extend along more than one tension bar along the fillets, in order to support any free area between tension bars.

15. A T-profile junction of composite materials comprising:

a composite T-profile having at least one web with an end region and at least two flanges angled with respect to the web, each flange connected to the end region of the web with a fillet, the web defining a through passage adjacent to the fillet;

a base plate extending along a majority of a surface of the flanges opposed to the web; and

a biasing mechanism comprising a tension bar having a bridge positioned between first and second lateral supports, each lateral support defining a fixation opening, wherein the tension bar extends through the through passage and is releasably mounted to the base plate using a fastener through each fixation opening of the tension bar;

wherein the biasing mechanism is adapted to force the fillets towards the base plate when the tension bar is biased against the base plate and the respective flanges of the T-profile by fasteners through the fixation openings on either side of the web.

16. A T-profile junction according to claim 15 , wherein the bridge of the tension bar is configured to provide a spring function when the tension bar is biased against the base plate and the respective flanges of the T-profile.

17. A T-profile junction according to claim 15 , wherein the biasing mechanism further comprises first and second support rods, each rod positioned between a respective fillet and the tension bar on opposed sides of the web, the support rods configured to press against the fillets when the at least one tension bar is biased against the base plate.

18. A T-profile junction according to claim 17 , wherein the through passage is a first through passage, and the tension bar is a first tension bar;

wherein the web defines a second through passage spaced apart from the first through passage and adjacent to the fillet;

wherein the biasing mechanism comprises a second tension bar extending through the second through passage and releasably mounted to the base plate; and

wherein the first and second support rods extend between the first and second tension bars thereby supporting a region of the T-profile junction between the first and second through passages.

19. A T-profile junction according to claim 15 , wherein the biasing mechanism further comprises first and second support pads, each support pad defining a through hole configured to receive one of the fasteners, each support pad positioned between a respective fillet and the tension bar on opposed sides of the web, the support pads configured to press against the fillets when the at least one tension bar is biased against the base plate.

20. A T-profile junction according to claim 19 , wherein each of the first and second support pads has a rounded side adapted to mate with the fillet.