Report For The Load Test
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Report for the load test result carried out for the Ground floor slab for Proposed Residential Unit At Pallekale. Test is carried as per the BS 8110 Part 1 1985
Test load Decided by Dr Udaya Dissanayake considering the design live load Test load as imposed load = 280kg/sm Test Criteria as per 9.5.4 of BS 8110 • The initial deflection and cracking should be in accordance with the design requirements • Where the significant deflections have occurred under the normal loads the percentage recovery after the second loading should at least equal that for the first loading circle and should be at least 75 % for reinforced concrete.
Assessments of results We consider slab as collection of beams for basic design calculations. As per the 9.5.3 of BS8110 Part1 1985 Assessing of the results is done by comparing the measured performance with that expected on the basis of the design calculations. We are considering basic span / effective depth ratios which is used for basic design calculations. From the table 3.10 Basic Span/Effective depth ratio for continuous Rectangular beam section = 26 This span /effective depth ratio based on the Total deflection = Span /350 considering partitions and finishes. In this case maximum shorter span of the panels = 4 (panel no 21 ) For this Span/Effective depth ratio = 4/.15 = 26 So based on above span/effective depth ratio Maximum total deflection for all the panel tested should be lesser than Span/350 Considering maximum shorter span Allowable deflection = 4000/350 = 11.43 mm
Recommendations and conclusions We can recommend by analyzing the test results as per the BS 8110 Part 1 1985 followings • • • •
Deflection of any panel tested does not exceed the allowable deflection of 11.43 mm Percentage recovery of deflection is greater than the requirement of 75% except for panel no 12. Since the deflection is very lower than the allowable (that is maximum deflection we had is .73 mm ) for the panel no 12 there is no significant effect by non recovered percentage of deflection. So we can recommend that load test is O.K and satisfy with the BS 8110 Part1 1985.
Test load Decided by Dr Udaya Dissanayake considering the design live load Test load as imposed load = 280kg/sm Test Criteria as per 9.5.4 of BS 8110 • The initial deflection and cracking should be in accordance with the design requirements • Where the significant deflections have occurred under the normal loads the percentage recovery after the second loading should at least equal that for the first loading circle and should be at least 75 % for reinforced concrete.
Assessments of results We consider slab as collection of beams for basic design calculations. As per the 9.5.3 of BS8110 Part1 1985 Assessing of the results is done by comparing the measured performance with that expected on the basis of the design calculations. We are considering basic span / effective depth ratios which is used for basic design calculations. From the table 3.10 Basic Span/Effective depth ratio for continuous Rectangular beam section = 26 This span /effective depth ratio based on the Total deflection = Span /350 considering partitions and finishes. In this case maximum shorter span of the panels = 4 (panel no 21 ) For this Span/Effective depth ratio = 4/.15 = 26 So based on above span/effective depth ratio Maximum total deflection for all the panel tested should be lesser than Span/350 Considering maximum shorter span Allowable deflection = 4000/350 = 11.43 mm
Recommendations and conclusions We can recommend by analyzing the test results as per the BS 8110 Part 1 1985 followings • • • •
Deflection of any panel tested does not exceed the allowable deflection of 11.43 mm Percentage recovery of deflection is greater than the requirement of 75% except for panel no 12. Since the deflection is very lower than the allowable (that is maximum deflection we had is .73 mm ) for the panel no 12 there is no significant effect by non recovered percentage of deflection. So we can recommend that load test is O.K and satisfy with the BS 8110 Part1 1985.
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