Engineering Failure Case Study

Failure epitome at DMRC On July 12th 2009 a metro bridge that was under winding payd due to negligence by an region in-charge of the Badarpur resistance line. The bereavement of the bridge killed 6 and injured another 15 when the bobtail goon sheared from the connecting pillars. The Delhi Metro rail Corporation took hold heat from this calamity because the roadway was a major milepost of providing a reliable and easy loaded of transportation to the peakitol of India.The DMRC is considered the most reputed radix cheek of India and neglecting roadways to the point where they fail is not an option. During that twenty-four hour period the bobtail upper-case letter collapsed causing the collapse of the instauration girder, span between p-66 and p-67 dockages which had already been erected and pre-stressed, and also segments of the superstructure for the span between p-67 and p-68. The sour grass cap (p-67) sheared from the connecting point of the pier and pier cap.T he top funding of the project beam did not contribute whatsoever development into the pier itself which ca utilize the shear itself. The presentation girder has failed due to the reverse of the pier cap. This failure also caused the span between piers 67 and 68 causing it to be prepared sustentationed by the ground on one end and the pier cap on the other. With the failure of the pier cap and span between piers the stretch used for nurtureing the launching girder also failed on July thirteenth 2009.Bending of the crane shows the clear sign of overloading which was caused by not analyzing the quantity of stress the crane could handle. The causes of the failure are many and at one time one portion of the roadway failed it caused a chain reaction to the entire infrastructure collapsing. The pier (p-67) was initially designed as a leg of a adit frame between piers but past was changed to support the pier cap. The same dodging was used for piers p-66 and p-68.The top rein forcement was disadvantageously engineered the pier cap had a reinforcement of 36mm diameter and a space of 500mm which was an meagerly bond length for the structure. During the launching surgical procedure the launching girder itself developed a divulge that was grouted in come apart areas and further change by introducing prop or jacketing. During the launching of superstructure 6 segments where lifted and the whole system collapsed when the seventh segment was hooked up for lifting.It was concluded that the failure of the pier cap occurred to the improper jacketing done when a crack had occurred. This was also coupled with inadequate length of support and reinforcement of the cantilever pier cap. The failure of the cranes was the fact that the capacity of 2 cranes where not able to hold the cargo of the superstructure which caused the larger 3rd crane to fail. The Delhi Metro Rail Corporation sacked the semiofficial in charge of the Badarpur Metro line, Vijay Anand for n eglecting his duty.Structural designs should gift been proof checked by an experience morphologic engineer. Also once failure had been observed the structure should have been ramshackle and a new structure should have been built. Make shift reinforcement to scavenge a failed structure was a major neglecting issue and engineering failure. The lack of professionalism that top off to the superstructure failure started with trying to fix the failed pier cap and neglecting the fact that the cranes used to lift the structure where not engineered to hold the amount of weight that needed to be supported.The support reinforcement should have been checked by an experienced engineer that should have intimately seen the reinforcement issue between the pier and pier cap. The information for this case study was found from www. engineeringcivil. com/theory/civil. engineering-disaster. com and www. thaindian. com. The entire structural failure was found on these sites including who was a fau lt and why the structure failed.