Simplified static analysis method for bridge pier under lateral impact
In order to thoroughly explore the simplified static method for reinforced concrete bridge piers under lateral impact,the calculation formulas of bending strain energy and shear strain energy of the piers were estab-lished based on the equivalence of lateral deformation effects between impact and static loading.For the bridge pier models with different cross-sectional forms and different constraints,the simplified equations for the equivalent impact force under sinusoidal,triangular and rectangular impact load waveforms were derived,and the relationship between the peak impact force and the equivalent value was analyzed.The results show that when the ratio of the impact point distance from the pier base to the section length of rectangular section piers is less than 3.7,or the ratio of the impact point distance from the pier base to the section radius of circular sec-tion piers is less than 6.2,it is necessary to take the effect of the shear strain energy of the piers into full con-sideration.The load waveform has great influence on the value of equivalent impact force.When the wave-forms of impact load are close to sine,triangle and rectangle,the recommended values for the equivalent im-pact force coefficients are 0.64,0.52 and 0.91,respectively.The results can provide a reference basis for the equivalent impact force value of bridge piers.
bridge engineeringstatic simplificationlateral impactbridge pierstrain energy
万方数据
维普
