Engineering Failure Case Study

loser Analysis at DMRC On July 12th 2009 a metro bridge that was under construction collapsed overdue to negligence by an office in-charge of the Badarpur vacuum tube line. The ill of the bridge killed 6 and injured another 15 when the bob cap she ard from the connecting pillars. The Delhi Metro trail Corporation took major heat from this incident because the route was a major milest angiotensin converting enzyme of providing a authorized and easy mean of transportation to the capitol of India.The DMRC is considered the most reputed groundwork organization of India and neglecting passs to the show where they fail is not an option. During that twenty-four hour period the bob cap collapsed causing the collapse of the accounting entry girder, broom betwixt p-66 and p-67 wharfs which had already been erected and pre-stressed, and also portions of the super social organisation for the span between p-67 and p-68. The pier cap (p-67) sheared from the connecting point of th e pier and pier cap.The top reinforcement of the project beam did not have any reading into the pier itself which caused the shear itself. The launching girder has failed due to the affliction of the pier cap. This bereavement also caused the span between piers 67 and 68 causing it to be disposed tolerateed 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 out used for lifting 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 amount of stress the crane could handle. The causes of the failure are many and formerly one portion of the roadway failed it caused a chain reaction to the entire basis collapsing. The pier (p-67) was initially designed as a leg of a portal frame between piers but then was changed to support the pier cap. The resembling method was used for piers p-66 and p-68.The top reinforcem ent was gravely engineered the pier cap had a reinforcement of 36mm diameter and a space of 500mm which was an insufficient bond length for the body structure. During the launching operation the launching girder itself developed a tear that was grouted in crack areas and further beef up 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 item that the capacity of 2 cranes where not able to accommodate the weight of the superstructure which caused the larger 3rd crane to fail. The Delhi Metro Rail Corporation sacked the official in charge of the Badarpur Metro line, Vijay Anand for neglecting his duty.Str uctural designs should have been proof check by an experienced structural engineer. Also once failure had been observed the structure should have been abandoned and a new structure should have been built. exercise shift reinforcement to save a failed structure was a major neglecting issue and engineering failure. The escape of professionalism that lead 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 mandatory to be supported.The support reinforcement should have been examine by an experienced engineer that should have substantially seen the reinforcement issue between the pier and pier cap. The information for this case study was found from www. engineeringcivil. com/ guess/civil. engineering-disaster. com and www. thaindian. com. The entire structural failure was found on these sites including who was a fault and why the structu re failed.