Guan Yonghai
Guan Yonghai

Guan Yonghai
Ph.d.


Publications

Calculating Steel Bridge Spans on Earthquake Loads
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It is shown that in many cases while calculating bridge spans it is necessary to take into account the soil-structure interaction. If the pier is higher than 5 m, energy dissipation for the main oscillation mode is determined substantially by energy losses, caused by wave propagation in the soil base, thereby the dynamic ratio drops significantly. Furthermore, if a bridge span is shorter than 55 m and the base modulus of deformation Eo < 30 MPa, the force in the piers can be determined by the second mode, for which the superstructure and piers oscillate in antiphase. For bridges with spans over 80 m long at Eo > 30 MPa, seismic forces for spans and piers are determined by the first oscillation mode. 

Score reduction factor for calculating the pylons of bridges
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The reduction factor K1 included in the formulas of Guidelines for calculating seismic loads for bridge piers has been evaluated. The dependence of the reduction factor on the ratio of pier reinforcement has been obtained. To this aim the non-linear finite element calculation of the pier under monotonous loading has been carried out and the elastic limit and damaging displacement has been obtained.