In order to study the seismic performance differences between the steel box-concrete deck composite girder bridge with corrugated webs(CW-SBCCGB)and the traditional box girder bridge,according to a CW-SBCCGB section in practical project,the section of concrete box girder bridge with corrugated steel webs(CW-CBGB)and concrete box girder bridge(CBGB)are established based on the section equivalence principle.Combining the dynamic analysis theory and finite element model established by software ABAQUAS,the similarities and differences of dynamic characteristics and seismic performance of three simply supported beam bridges with different sections are compared and analyzed.The results show that the first to fifth orders mode shape of the three types of simple-supported beam bridge are unchanged,the first to third order frequencies of CW-CBGB and CBGB decrease compared with that of CW-SBCCGB,and the difference between them does not exceed 1 Hz,but the difference becomes larger after the fourth order and beyond.The shear-lag effect has a greater effect on the dynamic characteristics of CW-SBCCGB and CW-CBGB,and a smaller effect on CBGB.Under the longitudinal and vertical earthquake action,and horizontal and vertical earthquake action,the pier top displacement and mid-span displacement of CW-SBCCGB and CBGB are larger than those of CW-CBGB,the shear force at the mid-span section of CW-SBCCGB is the smallest,and the bending moment at the mid-span section of CW-CBGB is the smallest,which indicates that the earthquake resistant performance of CW-SBCCGB is better than that of CW-CBGB and CBGB.
维普
万方数据