The Dynamic Response Of Reinforced Concrete Beam Structure Under Explosion Load And Numerical Simulation

With the pace of urbanization accelerated, many bridges and high-rise concrete buildingstructure spring up continuously, because of human or accidental factors, these structures may besubject to impact and blast attack at any time, Generally blast loading on the structure is ashort-term load that has great destructiveness, In case of the explosion and the impact of accident,it will bring the life and property of people huge losses, so the topic of structure dynamicresponse under the action of explosion attracts much attention in the word. In this paper, it’smainly researched stress wave propagation and dynamic response of reinforced roncrete beamstructure under explosion load on the basis of reading a lot of references on primary research.The following aspects of work is mainly done:1.study the stress wave propagation in a variety of media, we get the spread function ofstress wave propagation in different media by using wave equation,the initial condition andboundary condition. Any particle vibration propagation in medium can be known from thefunction.2. Vibration velocity and displacement with the attenuation formula of propagation eachparticle is got by the propagation of stress wave function.3. The principle and method of modal superposition, PIM(Precise integration Method)andnumerical simulation are introduced in this paper.and then compare the advantages anddisadvantages of this three methods by calculating the dynamic response of4. PIM and ABAQUS numerical simulation method are used to calculate the dynamicresponse of simply beam under multiple loads, verify the beam displacement of each particleUnder multiple load in is equal to the effect when each load is separately on the simple-supported beam, it meet the principle of superposition.5. ABAQUS is used to simulate the six layer frame structure’s dynamic response, We canget the vibration and displacement of X Y Z three direction of each particle on each floor of theframe structure that provides a theoretical basis to judge whether the structure will be destroyedunder the blasting seismic.Finally, summarize the work and main conclusion, pointed out the deficiencies of thisthesis.