桥墩受侧向撞击作用下静力简化分析方

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 established 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 section piers is less than 6. 2, it is necessary to take the effect of the shear strain energy of the piers into full consideration. The load waveform has great influence on the value of equivalent impact force. When the waveforms of impact load are close to sine, triangle and rectangle, the recommended values for the equivalent impact 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.