Aiming at the problem that the current seismic design code in China has not yet given an exact method for calculating the plastic hinge length of reinforced concrete(RC)high piers with thin-walled hollow sections(THSRC piers for short),the existing plastic-hinge length calculation methods for RC piers and test data were firstly collected,and the main factors that affect the calculated plastic-hinge length were analyzed.Meanwhile,the structural parameters of THSRC piers used in actual bridge projects were summarized statistically.After verifying the accuracy of the finite element modeling(FEM)method,ABAQUS software was used to establish a refined FEM of eight typical THSRC piers with a height of 40 to 120 m,and nonlinear pushover analysis was carried out to obtain the equivalent plastic hinge lengths of different high piers.Finally,the applicability of various plastic hinge length calculation methods was discussed,and it is found that the calculation formula of Eurocode 8 specification has the highest accuracy,which can be used to calculate the plastic hinge length of THSRC piers.
关键词
塑性铰长度/连续刚构桥/钢筋混凝土薄壁空心高墩/有限元分析
Key words
plastic hinge length/continuous rigid bridges/reinforced concrete high piers with thin-walled hollow sections/finite element analysis
维普
万方数据