 |
|
|
|
Basildon Test ReportSummary of Test Programme and FindingsSeries 1 - Static Load TestingThere were two motives for conducting these tests. The first was to establish if the plate action induced by the anchors, indicated earlier by the dynamic testing was maintained beyond full service loads and the second was to provide additional information to complement a large programme of full scale floor testing previously conducted by BRE. A number of load tests were conducted on floors A and B with the anchors in place which investigated; lateral load transfer under different concentrations of load, the deflected forms of the individual planks and the transverse deflected profile of the floors. The anchors in floors in area B were then cut and the load tests repeated on the same areas. Although the absolute deflections were still very small under these serviceability load levels the tests showed that the deflections of the planks increased when the anchors were cut and the floors reverted to a predominantly one way spanning system. Therefore these static tests demonstrated that (a) two way spanning action was maintained up to full service loads and (b) confirmed that by cutting the anchors the floors reverted to a predominantly one way spanning system in accordance with conclusions reached from the dynamic testing. Series 2 - Lateral Plate ActionThis test was designed to check the assumption that the anchors produce plate action by connecting individual precast planks so that they may transfer "in plane" forces to the parallel shear walls. This load testing was conducted on both ends A (anchors intact) and B (anchors cut) on the roof components with the waterproofing screed having first been cut along the lines of the plank junctions to avoid the complications of composite action with the roof finishes. The test method employed was to apply a direct tensile force to the ends of one of the planks (Fig. 4) near the centre of the roof area and to monitor the deflected profile along the edge of the roof. If the planks were effectively connected the end profile would be in the form of a smooth curve with evenly distributed deflections from a maximum at the point of load application to a minimum adjacent to the side walls. If unconnected, one would expect most of the movement to be concentrated at the plank subject to load application with a much poorer distribution of movement across this width of the roof. Test Report Page 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8
| 9 | 10 | 11 | 12 CINTEC, CINTEC MC Systems, Presstec and Archtec are all Registered Trade Marks, Copyright ©1996-2002 |
