OOS Collapse Propagation Model Part II

Quote:

Originally Posted by JSanderO (Post 10929302) The concept of some subject to stress beyond its design envelop and failing is hardly revolutionary or disputed. We also know that structures are designed with reserve capacity and strategies hopefully to limit damage and not go "runaway"... that is putting all one's eggs in one basket.

Which structures are designed to "not go 'runaway'"? Please be specific. In all my years as a structural engineer, I've never designed a structure to not go "runaway", nor have a read a published document advising engineers to do so, nor is it standard practice anywhere I've worked or studied.

There are two goals in strength design. First is to prevent a failure under extremely unlikely chance of exceedence loads. The second, and this doesn't apply to all members or all materials, is to ensure a ductile failure mode, so that the inhabitants can tell that the structure is in distress and have time to either fix the problem or evacuate before a collapse.

Or are you trying to refer to progressive collapse?

This is the continuation thread. For the first part, see this thread.

Posted By:kmortis

via International Skeptics Forum http://ift.tt/1X6QlnZ