- Title
- Reliability-based design load factors for explosive blast loading
- Creator
- Stewart, Mark G.; Netherton, Michael D.
- Relation
- ARC.DP110101397
- Relation
- Journal of Performance of Constructed Facilities Vol. 29, Issue 5
- Publisher Link
- http://dx.doi.org/10.1061/(ASCE)CF.1943-5509.0000709
- Publisher
- American Society of Civil Engineers
- Resource Type
- journal article
- Date
- 2015
- Description
- Reliability-based design allows the decision maker to select the level of reliability for a specific blast loading scenario and key to this is an understanding of airblast uncertainty. Hence, explosive field trials have been conducted in Australia that measured the variability of free-field blast loading caused by military standard plastic explosives. The results have revealed a high level of variability of peak incident pressure, impulse, and time of positive phase duration for repeatable tests where variability would be expected to be a minimum. The accuracy of predictive blast load models (model error) was also assessed. A probabilistic blast load computer model is revised to capture these observed variabilities. The effect of a 20% mass-increase safety factor typically applied to explosive mass on the probability of exceeding a design blast load is assessed. Reliability-based load factors are calculated where the nominal load is multiplied by the load factor to ensure that the actual load is equal to the reliability level. Reliability-based load factors are estimated for reliability levels of 0.05-0.99, for a range of scaled distances for military munitions. The load factor can be as low as 0.66 for a 0.05 reliability level and as high as 1.30 for a 0.99 reliability level.
- Subject
- reliability-based design; blast loading; airblast; explosive field trials
- Identifier
- http://hdl.handle.net/1959.13/1330328
- Identifier
- uon:26355
- Identifier
- ISSN:0887-3828
- Language
- eng
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