The Dynamic Behavior Research Of Prestressed Concrete Beam Under The Conditions Of Detonation

Along with the rapid development of urban construction, there are more and more underground malls, underground parkings, underground casinos and large span underground building. Because of the large span of the underground engineering, if still use the traditional reinforced concrete structure, it is hard to resist explosion caused by impact loading.so that it’s difficult to be guaranteed the structure of the safety of personnel and equipment safety So the traditional concrete structure needed to expand geometry and increase the foundation pit excavation depth. However, it is often subject to the limitations of space and funds and works effectively reduced space. Prestressed concrete structure with a smaller cross-sectional dimension, low deflection and span ratio, high load capacity, high crack resistance, durable, space utilization and significant economic benefits, etc.is more suitable for large span structures. However so far at domestic and foreign in the antiknock performance of prestressed concrete structures carried out few. People worry about the poor ductility of prestressed concrete structures, prone to brittle failure. For a long time about lack of prestressed concrete application in the uprising structure, therefore it’s essential to carry out the study of prestressed concrete structures uprising performance.This paper simulates the process of static load and model test through ANSYS and dynamic response under the condition of detonation through LS-DYNA about the pre-stressed concrete beam. By contrasting the experimental results and numerical computing result, the general rule of deformation of concrete beam with different bonding forms is achieved. And by contrasting the different bonding forms of pre-stressed concrete beams in the distinction between capacity, deflection and ductility then a structure for different construction requirements is found. It also explores the degree of similarity of the calculated and experimental results in the numerical simulation of the process by selecting the different parameters and control conditions. The final result shows an excellent agreement between numerical simulation results and the experimental results, and it provides a reference and supplement for the experimental results. It initially finds mechanism pre-stressed concrete beam deformation under impact loading and provides a new way to resolve the problem that data cannot be obtained by experiment because of the limit of the test conditions, the number of structure and the experiment fund.