SAFETY LEVEL ASSESSMENT OF EXPANSION JOINTS IN REINFORCED CONCRETE SLABS TO TEMPARATURE VARIATIONS.
Publication Date : 01/02/2017
This paper presents the safety level assessment of expansion joints in reinforced concrete slabs subjected to temperature variations taking into consideration the BS 8110 (1997) code provision of 25 mm expansion joint at every 30 m of the slab. Reliability analysis of the expansion joint in reinforced concrete slab to ascertain its level of safety was carried out using first order reliability method (FORM).Sensitivity analysis was carried out by varying the change in temperature and length of the concrete slab. The results showed that there was a general decrease in safety index from 18.60 to 9.46 with increase in temperature change from 5 to 20oC. The safety index of the expansion joint in slab is conservative and sensitive to temperature variation and the length of slab.
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