I have been “writing” this blog for a good number of years now and once in a while I like to survey the landscape and see what is out there. By out there, I mean, other engineering blogs.
The Happy Pontist remains the gold standard for a well written sometimes acerbic take on bridges throughout history. The one fault I have with HP, entirely my own preference, was the desire that he or she had their name on the masthead. I would like engineers to have some role models, of which, HP is a very good one. But I do understand the nature of wanting to keep one’s, day job.
So, I went forth and typed in “Bridge Engineering Blog” into the google and found that a) bridge blogs are hard to find (written by actually bridge engineers and not corporations) and 2) that I had written this exact post in 2009.
At that time I also pondered the lack of engineers out there discussing their work. I, of course, realize the blog is dead and now vine, Instagram, whatsapp (quit writing me by the way, stupid 19 billion) and others are the way to go.
So, what to do. I guess I should be proud that I am one of the top ten bridge blogs written by an actual bridge engineer. (I made that statement with a number of fingers crossed, made it tough to iPad. Since I doubt there are more than ten blogs out there, I should be in the top ten.)
Oh well onward and upward, now here is a picture of a cat. You have to feed the internet….
Great watercolor demo from Joseph Zbukvic.
This is a review I received on my Structural analysis example kindle book. (Link on the right)
Seems very fair and exactly what I was going for…..thanks PDC for the review!
4 out 5
I’m a practicing structural engineer and bought this as I thought I could review some examples of problems in structural analysis. It is, in essence, basic structural analysis (the word “introductory” probably should’ve given it away, huh?). Most problems are likely problems from Nielsen’s texts that he’s used over the years, minus the commentary. There’s probably some additional problems in here as well, but there is very little in-depth commentary or explanation or complicated examples.
I wouldn’t recommend for someone trying to learn the material, without the addition of a course text. On the other hand, it is likely a decent source to go hand-in-hand with someone taking the course or who has the knowledge of structural analysis. All in all for $1.99, it’s a good review text.
A sorta quick introduction to PowerPoint animation.
Sometimes the video will not play in HD on a mobile device, so go to my youtube account for better quality.
As you have probably heard the Cau Cau bascule bridge in Chile had some problems…
Love this tweet!
I am showing this to my class this week. Due to a bad engineering detail a large number of people were killed when a walkway collapsed during a dance party.
On July 17, 1981, 113 people were killed and 186 injured when two suspended walkways collapsed in the Hyatt Regency Hotel in Kansas City.
This was the most devastating structural collapse in U.S. history-an accident that could have been prevented if a better-coordinated engineering review had taken place in the shop drawing process.
The original design specified six single forty-six-foot rods to run from the ceiling through the fourth-floor box beams and on through the second-floor box beams. During the course of construction, shop drawings were prepared by the steel fabricator suggesting that a set of two hanger rods replace the single hanger rod on the second- and fourth-floor walkways.
This change transferred all of the second floor load to the fourth-floor box beam, doubling the load transmitted through the fourth-floor box beam to the upper hanger rod.
This submittal was stamped by the architect, the structural engineer, and the contractor, indicating their review.
This is the modification that caused the doubling of the load to the connection.
And this is what the scene looked like that day.
A good video overview of the tradegy, Part 1 and 2 by R. Teshia.
You know engineers can make bridge piers in any shape or form we want. How come, they always have to look so square…
So, in honor of “winter go away”, elephant bridge piers!
Trying to reach the metric side of the world, this is a metric simple span beam analysis with a single point load. I show the hand calculations and how to analyze it in STAAD.
More to come, with increasing levels of difficulty…(hopefully)
I saw this video featuring Jack Welch and I am of two minds about the subject matter.
On the one hand it is pure capitalism and honest in describing how a corporate culture works. How the top players are rewarded and how the bottom 10% are regarded.
But something about it seems off, maybe I’m just too sentimental or maybe I’m too Canadian. (Canadians will know what that means…)
An interesting bridge for a cold night, photo by megapedant.
This method of construction was first proposed by British-born American architect Benjamin Henry Latrobe in 1802.
Look up Latrobe, he designed some wonderful things….
I saw the original image on www.thesca.org in a photo contest. I’m not using it for money but for some visualization fun. (I don’t want to offend the original owner but it is such a great image.)
Thank goodness January is coming to an end. A great song from the past to celebrate. (I have this album on vinyl)
Coffee Break visualization, just playing around.
I was in a hurry with this one so the light is not quite right in the final image. Got the image from Wikipedia and modified it in sketchup and Gimp.
A quick photo exchange with some odd bridge in England….
Hey Trimble when are you going to start sponsoring this blog!
The first video shows you how to make a component that can cut openings in two planes, not something Sketchup likes to do…The second video was my quick attempt at making a Eco-House in Sketchup in less than 30 minutes. (Dies a bit at the end, sigh..)