Blasting Earthquake Caused Damage To The Building Security Identification

Today of economy and productivity high speed development, the capital construction of our country is also developing with unprecedented scale. The advantage field head exploding with its fleetness, high-effect, low cost but having extremely on becoming a project elects, it plays an important role in capital construction of our country. The application on the project is more and more widespread with exploding, damage also brought about increasingly. Therefore, this article main research the building structure dynamical response and safe under the effect by explosion vibration.Our country, at present still adopts unitary vibration speed to be unique safe criterion index. To a certain extent, unitary vibration can reflect the vibration intensity by explosion, but, many times project indicates very big limitation. This article accorded to above shortage to improve the safety criterion and to stud of the structural dynamical response and to find out to the building damage reason under explosion vibration.In order to study the damage degree of structure caused by blasting-induced ground motion, this article utilizes the ANSYS analysis software to establish linear structural model, analyzes and calculates the damaged parts and rule of the structure. According to the research we can know that the characteristics of blasting-induced ground motion is high-frequency, big amplitude, the short time interval, the effect for structure depends on the amounts detonating impingement mainly . At the stage of the compels vibration ,Think that structure shocks stage in being forced, vibration frequency is high, displacement is minor, acceleration is big since exploding, have made structure produce very big shearing forces, big , surely being going to if that vibration is sufficient makes structure come into being in the moment shearing destroy; Think that structure shakes a stage in liberty , vibration frequency is low , displacement is big , acceleration is small , structure comes into being damage. Therefore, whatever it is compelled or the free vibration, the structure all has the potential security problem.Therefore, when we research the influence of blasting-induced ground motion vibration to structure, we should analyze the problems comprehensively, and then the explosion can be used in the national capital construction and also can avoid the damages to the circumferential buildings caused by explosion vibration.