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As a result, the method will always predict an unconservative collapse load.
In these tests, collapse loads of between 3 and 4 times those predicted by yield-line theory were obtained.
If the correct collapse load is found, the two methods will give the same result for the collapse load.
Until then, all design of steel structures was based on elastic theory of design, which gives an upper bound on the collapse load.
Therefore it gives an upper bound on the collapse load (the load at which it collapses will not be higher than that calculated).
They can also be designed with yield line theory, where an assumed collapse mechanism is analysed to give an upper bound on the collapse load (see Plasticity).
The technique has been utilised most significantly in the field of soil mechanics for the determination of collapse loads for geotechnical problems (e.g. slope stability analysis).
However, although large increases are achieved in the ultimate collapse load, the concrete will crack at only slightly enhanced load, meaning that this application is only occasionally used.
During his time in this post, he developed the plastic theory of design, a revolutionary method of design of steel structures which gives a lower bound on the collapse load, and is hence always safe.
Furthermore, TriMedia processors boast advanced caches supporting unaligned accesses without performance penalty, hardware and software data/instruction prefetch, allocate-on-write-miss, as well as collapsed load operations combining a traditional load with a 2-taps filter function.
Limit analysis is a structural analysis field which is dedicated to the development of efficient methods to directly determine estimates of the collapse load of a given structural model without resorting to iterative or incremental analysis.
If, for a given external load, it is possible to find a distribution of moments that satisfies equilibrium requirements, with the moment not exceeding the yield moment at any location, and if the boundary conditions are satisfied, then the given load is a lower bound on the collapse load.
A finite element limit analysis (FELA) utilises optimisation techniques to directly compute the upper or lower bound plastic collapse load (or limit load) for a mechanical system rather than time stepping to a collapse load, as might be undertaken with conventional non-linear finite element techniques.
Although the discontinuity layout generation and linear programming optimization schemes used in DLO will usually ensure that a good approximation of the true collapse mechanism is found, there is no way of discerning by how much the predicted collapse load will exceed the true collapse load without comparison to an independent lower bound analysis.