Analysis of frame structure by Stadd Pro

This is a video to help students understand the frame structure analysis done by Stadd Pro


Design of simply supported beam

This is a video to help students understand Design of simply supported beam


Tacoma Narrows Bridge Collapse

It was an unfortunate morning of 7th November 1940 when winds having speed of 42 miles per hour suddenly twisted the Tacoma Narrows Bridge and lead to its collapse. This accident though didn’t look any lives but it surely made the civil engineers to think new ways to combat bridge collapses.

Some of the important statistics of this bridge are –
It is located in Tacoma, Washington, USA and was completed in 1940. This was a suspension type of bridge with length of 7,392 feet and was built at the cost of $6.4million.It had the longest span of 2800 feet.

The bridge was designed by engineer Moisseiff who had strengthened it with a solid steel girder beneath the roadway.But the problems started soon it was opened to traffic.Under strong winds, it swayed much beyond the permissible limits and thus sent rippling waves along the deck. It took just 4 months before this bridge collapsed after its completion.

On investigating it was found that the solid steel girders provided to strengthen the bridge were actually blocking the wind which caused the bridge to twist.Due to this a swirling motion developed which ultimately lead to the collapse. After knowing the reason for collapse a new bridge was constructed which had a truss so that it can allow the passage of wind


This bridge also got the name “Galloping Gertie” due to its unusual twisting and rolling behavior.

See this video to see how this “Galloping Gertie” used to sway.

Skywalk – Glass Bridge

Skywalk commonly known as The Glass Bridge is one of the aspiring civil engineering project which shows the unmatched thinking of civil engineers.The construction of this glass bridge started in March 2004 .Glass Bridge will be suspended 4,000 feet above the Colorado River on the very edge of the Grand Canyon. In 2005, it was tested for its structural ability and the results were really very good. It passed all its engineering requirements by 400 percent and therefore the total load which this glass bridge is able to withstand is equal to the weight of 71 fully loaded Boeing 747 airplanes which is more that 71 million pounds. The bridge will be able to sustain winds in excess of 100 miles per hour from 8 different directions, as well as an 8.0 magnitude earthquake within 50 miles. It is said that more than one million pounds of steel was used in the construction of the Grand Canyon sky walk.


Following are the images of this marvelous project –




The other view of this glass bridge is




Also check this video for a real feel of the bridge

Extreme Engineering : Tokyo’s Sky City

Sky City Is one of the most amazing projects civil engineers have ever imagined.It will not only change the way people use to live but will also start add a new horizon in the limitations of human thinking.