Research On A Simple Rc Frame Column Model To Resist Lateral Impact Load

Recently, along with a series of explosion and impact accidents, the study on anti-impact of structure is becoming an important subject in the field of disaster prevention and reduction engineering and protective engineering. Blast load and impact load as two typical loads, the dynamic response of reinforced concrete frame column under impact load takes on locality, a simply column model is used when research on anti-impact test by people frequently, therefore study simple model of frame column by applying restraint to its ends will benefits for the test of anti-impact and prevent consecutive collapse.According to principles of structural dynamics and finite element method of analysis, the whole three-dimensional model of reinforced concrete frame was established by the finite element analysis software ANSYS, based on dynamic load with features, more simple model were further simplified. According to the size of peak load and the length of time, impact load can be divided into three kinds. Three kinds of explosive loading conditions were founded according to load type, studied under different conditions in various simplified model of the dynamic response of frame columns. The results showed that: different types of loads can be reduced to a cross structure or framework of the column-side constraints to consider a single column model deal with resist impact analysis; also obtained the force process and failure modes of frame columns with corresponding types of different load.Furthermore, the simplified model of reinforced concrete frame columns under impact load was studied, six conditions of impact load were established and dynamic response of columns was analyzed. Through the forward three conditions of impact load,the results showed that: frame columns under three different types of impact loads, the process and damage patterns similar to blast load. Through the later three conditions of impact load,the results showed that: according to the difference between impact positions can also be selectively framework was further reduced to take into account cross-shaped structure or a single end-column constraint column model frame columns impact analysis.