Dynamic Magnification Factor of Pile-Supported Wharf under Horizontally Bi-Directional Ground Motion

ABSTRACT

This study proposes a generally applicable equation for dynamic magnification factor (DMF) based on the conditions for static equilibrium of an equivalent mechanical model for actual wharf under horizontally bi-directional ground motion. The new equation can be expressed as a function of eccentricity ratio and aspect ratio for wharf segment. The applicability and accuracy of proposed equation are validated by conducting two case studies that compare DMF determined by equation with that determined by nonlinear time history analyses using bi-directional earthquake ground motion records. The validation shows that the new DMF equation has favorable applicability and accuracy.

KEYWORDS:

• Pile-Supported Wharf
• Displacement-Based Seismic Design
• Displacement Demand
• Dynamic Magnification Factor
• Horizontally Bi-Directional Ground Motion
• Torsional Effect

Acknowledgments

This material is based on work supported by the National Natural Science Foundation of China (Grant No. 51678104) and Shandong Provincial Natural Science Foundation, China (Grant No. ZR2018BEE046). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of National Natural Science Foundation of China and Shandong Provincial Natural Science Foundation, China.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [51678104]; Shandong Provincial Natural Science Foundation, China [ZR2018BEE046].