钢筋混凝土柱抗爆试设计及其数值验证

he new edition of "Load Code for the design of building structures" (hereinafter referred to as "Load Code"), implemented on October 1 2012, adds a new chapter of accidental load which provides methods of determining the equivalent dynamic load of blast wave and calculating the equivalent uniformly distributed static load. The "Load Code" also provides a formula to calculate the accidental combination of load. This paper calculates the equivalent blast load under different blast scenarios in terms of the methods in new "Load Code" and compares the calculation results with that in the UFC guidelines. Then the equivalent uniform static load and the corresponding internal force are derived through the single degree of freedom (SDOF) analysis and maximum internal force equivalent principle. Finally, the RC columns' most unfavorable combination of internal force is calculated through the accidental combination of load equation for blast resistance design of the column. On this basis, further dynamic analysis would be carried out through the explicit dynamic finite element analysis software LS-DYNA to investigate the practical blast resistant capacity of RC columns, which are designed based on the new "load code". The results show that the blast load given in the new "load code" is low. However, the blast resistant RC column, designed based on the equivalent internal force method recommended in the new "Load Code", could withstand the action of the actual blast load with good blast resistant capacity. This research will provide references for engineers and technicians to use the new "Load Code" for blast resistant design of building structures.