Let’s play out the possible I35W bridge collapse scenarios: a greedy contractor in 1967 overrules an engineer’s insistence that the gussets on the Minneapolis I35W bridge be an inch thick. More money could flow to the bottom line is those gussets are only a half-inch thick. A less likely scenario in my opinion is that an engineer or group of engineers simply miscalculated. Then they’ll be the courtroom defense scenario: the half-inch gussetts were fine for traffic volume when the bridge was built in 1967, but could not possibly have accounted for increased traffic and heavier trucks 30-40 years into the future.
It won’t be clearcut, but someone somewhere, if they’re still alive should feel awful. Someone likely knows their work cost lives and untold grief for for the survivors. The Dept. of Transportation has issued an advisory that gussets for the nation 13,000 steel truss bridges should be checked. We await the final report on the cause, but all the telltale signs of trouble were there - missing bolts, corrosion and reports of swaying.
I am not a bridge or civil engineer, but knowing a bit about steel and having climbed the below deck super structure of the John Greenleaf Whitter Bridge as an adolescent, a half-inch plate steel gussett isn’t enough to take 7×24x365 pounding. This Warren-truss bridge connects Newburyport and Amesbury, Mass. via I-95.
connecting Amein Salisbury, Mass.
It’ll be very interesting when and if the
Somewhere an engineers or group of engineers know they will burn in gussett hell. Or someone who overuled
Truchard will be presented the award at the 2014 Golden Mousetrap Awards ceremony during the co-located events Pacific Design & Manufacturing, MD&M West, WestPack, PLASTEC West, Electronics West, ATX West, and AeroCon.
Robots that walk have come a long way from simple barebones walking machines or pairs of legs without an upper body and head. Much of the research these days focuses on making more humanoid robots. But they are not all created equal.
The IEEE Computer Society has named the top 10 trends for 2014. You can expect the convergence of cloud computing and mobile devices, advances in health care data and devices, as well as privacy issues in social media to make the headlines. And 3D printing came out of nowhere to make a big splash.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.