Chad,
You've asked good questions.
I've been studying structural failures throughout my career of three decades so far. It's hard to measure the impact of these failures on the profession, but my sense is that, while media coverage of failures does generally have some impact on the profession, a failure needs to involve substantial loss of life for there to be a substantial impact on the profession (to the extent that there's a noticeable change in practices). It seems that near-misses and failures with little or no loss of life tend to have limited impact on the profession, even if they make the headlines.
I agree that media coverage of such failures tends to lack depth, and is sometimes biased or factually inaccurate. The profession needs, and benefits from, thorough and unbiased investigations of failures, by qualified experts, with the forensic reports being widely disseminated, but not all major failures are investigated in this way.
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Irfan A. Alvi, P.E., M.ASCE
President & Chief Engineer
Alvi Associates, Inc.
Towson, Maryland
www.alviassociates.comialvi@...------------------------------