ndu_chucks: Hmmmm. I wouldn't expect the noticeable vibration of a major bridge as a natural state of engineering affairs. I lived abroad for many years and never felt the vibration of any bridge or ever heard of any commuter with such an experience.

From the engineering stand point, periodic stimulus of a mechanical system, such as wind buffeting a bridge could cause vibrations. These vibrations, however, are more or less in harmony with the bridge's natural vibrations (which are really not supposed to be felt by motorists). If unchecked, the vibration can increase drastically, sending destructive, resonant vibrations traveling through a bridge in the form of torsional waves.

God forbid, but when de bridge fall down, make una no blame GEJ and the responsible minister. I believe say dat bridge na federal structure.

4llerbuntu: Oh Please not again.

FYI those joints are MEANT TO MOVE AND VIBRATE!!!

there are like shock absorbers in cars. the bridge is in sections. and balanced on large pillars. there has to be some "cushioning" between the sections and the pillars else it will develop cracks and collapse

the "absorbers" is what they are supposed to be changing when they do their so-called renovation. your guess is as good as mine if they did


when u change your car absorbers, it has a lot more spring and bounce compared with when its damaged and your car body keeps hitting the tires and ground.


if that bridge is going to collapse it wont vibrate, it will develop large cracks in the concrete and come down



SO YES THE DAMN BRIDGE VIBRATES, IT HAS ALWAYS VIBRATED. ANYONE PERCEPTIVE ENOUGH SHOULD KNOW THIS.

i cant imagine what you would do if you were to be walking on foot on the bridge, jump into the lagoon?

justokey: Driving to work this morning, I witnessed a very scary scene at the 3rd Mainland Bridge in Lagos. The traffic was moving at a snail's pace as usual, when suddenly I was jolted by a sharp and tremendous vibration. I looked out and noticed that I was atop an expansion joint. What scared me most was that one side of the joint was noticeably vibrating. What I mean is that you could see one part swinging up and down. This happened at exactly the joint where the Lagos bound traffic from Adekunle meet the traffic from Oworoshonki. I was too shocked to take photos/video, perhaps if i have the courage to pass through there tomorrow i will do so.

wesley80: Long yawnnnnnnnnn! Perhaps your title should've read "is the third mainland bridge vibrating?" you need a handful of corroborators to come up with a declarative title like yours, for all I know you could've been high on early morning shekpe when you passed the bridge this morning! Did you also see a shark dancing etighi?

haba-nairaland:
Its normal, nothing alarming about the ish...
Byy the way, I made it to the --------- and I'm the fifth to complement.

justokey: Driving to work this morning, I witnessed a very scary scene at the 3rd Mainland Bridge in Lagos. The traffic was moving at a snail's pace as usual, when suddenly I was jolted by a sharp and tremendous vibration. I looked out and noticed that I was atop an expansion joint. What scared me most was that one side of the joint was noticeably vibrating. What I mean is that you could see one part swinging up and down. This happened at exactly the joint where the Lagos bound traffic from Adekunle meet the traffic from Oworoshonki. I was too shocked to take photos/video, perhaps if i have the courage to pass through there tomorrow i will do so.

felifeli: All structures and things vibrate. This is caused by natural transmission of impact or impulse through the structure.In this case the impact is due to the vehicle tyre loads and also impulse from vehicle noise.The only way that the bridge could collapse is when the frequency of the vibration harmonises with the natural frequency of the material of the structure , in which case the structure just liquefies (disintegrates). Expansion/construction joints work not only to accomodate internal stress from temperature variations but they also incorporate dampers which absorb the vibration to forestall collapse. Of course I speak as an engineer.

felifeli: All structures and things vibrate. This is caused by natural transmission of impact or impulse through the structure.In this case the impact is due to the vehicle tyre loads and also impulse from vehicle noise.The only way that the bridge could collapse is when the frequency of the vibration harmonises with the natural frequency of the material of the structure , in which case the structure just liquefies (disintegrates). Expansion/construction joints work not only to accomodate internal stress from temperature variations but they also incorporate dampers which absorb the vibration to forestall collapse. Of course I speak as an engineer.

wesley80: Long yawnnnnnnnnn! Perhaps your title should've read "is the third mainland bridge vibrating?" you need a handful of corroborators to come up with a declarative title like yours, for all I know you could've been high on early morning shekpe when you passed the bridge this morning! Did you also see a shark dancing etighi?

SamConquer: The Bridge Is ''Vibrating''. . .Please Set The Bridge To ''Ringing Tone''. . .

BayoAA:
If you travel along 3MB or any long bridge, you will notice that your car is running into a "bump-like" or "gallop"at interval. Those gallops are the expansion joints for thermal expansion.

ndu_chucks: God forbid, but when de bridge fall down, make una no blame GEJ and the responsible minister. I believe say dat bridge na federal structure.

Jakumo: Looking back over the responses in this topic, I note that many more writers than usual are female, and I would like to propound a hypothesis that the disproportionate female interest in this discussion thread might be due in part to the sub-conscious attraction of the word "Vibrate" to women who own one at home.

pankere: I'm the culprit. I forgot my nokia 3310 on the bridge yesterday n the vibration was due to incoming calls on the fone. U all know that fone is very powerful

isale_gan2: I think the civil engineers in our midst have answered the concern: It is supposed to!

Oh, another breaking news! Skyscrapers also "sway." All these humongous structures must have some flexibility, hence the swaying. I worked for years on the top floor of a 50-story building, and were told by the architect and developer that all tall buildings are built to withstand the frequent tornadoes we get in this part of the world. Glad I don't live in Chicago though.


Hmmm. Contradictory much? If it's a federal structure, you gonna blame the state government?

justokey:


Can you explain the bold words sir?