Simplified Methods for Analysis of Response to Dynamic

This Technical word describes the improvement and verification of a brand new SDOF version for metal participants topic to explosion loading. This record addresses a few of the shortcomings of the Biggs technique for the reaction research of constructions to dynamic loading generally, and to blast loading specifically. a brand new SDOF version has been constructed, that's subtle sufficient to seize the most results overlooked by way of Biggs, yet easy sufficient for functional software in a layout workplace atmosphere. This word presents an outline of the matter features in addition to the formula approach utilized in constructing the recent SDOF strategy. the main points of the hot version are then supplied, more often than not within the kind of parametric tables, protecting either the bending and catenary states of the elasto-plastic member reaction.

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It is evident from Figure 12 that the discrepancy between the proposed SDOF model and ADAFTIC reduces for such a member cross-section. The comparison against the results of ADAPTIC in Figure 1 1 is favourable, where small discrepancies are observed in the catenary stages, especially in the first transitional one, which reduce when using the nonlinear model. 25 m, and both proposed models are in fact typically conservative. 1400 1200 looo 0 5: Q ' 3; . 5 Displacement (m) Figure 11. Catenary response for example 5 FABlG Technical Note 7 - February 2002 @ The Steel Construction Institute 39 Simplified Methods for Response Analysis t o Dynamic Loading 1400 1200 5 a 0 1000 800 C cp Z 600 8 .

X: Reference coordinate. Y: Distance of extreme fibre from centroidal reference axis. Z, : Section elastic modulus. ([ri +2r, +r,’]/2).

1400 1200 looo 0 5: Q ' 3; . 5 Displacement (m) Figure 11. Catenary response for example 5 FABlG Technical Note 7 - February 2002 @ The Steel Construction Institute 39 Simplified Methods for Response Analysis t o Dynamic Loading 1400 1200 5 a 0 1000 800 C cp Z 600 8 . 5 Displacement (m) Figure 12. 9937~10' N/m , Kf. 73 15 x 10' - ____... - IA 4 I 400 200 -I + . . 5 Displacement (m) Figure 13. Catenary response for example 6 As observed in Figure 13, the catenary effect is reduced for this set of boundary conditions in comparison with the previous set, since the overall axial capacity F,” is reduced.

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