Abstract
In this article, the seismic performance of box-shaped steel piers embedded with energy-dissipating shells under a multi-directional seismic load is investigated. A finite element (FE) model was accurately established and verified by the quasi-static test results. A parametric analysis of the hysteretic behaviour of a novel box-shaped steel pier under eccentric pressure was carried out on this basis. We discussed the influence of the eccentricity, axial compression ratio, thickness of embedded shell, ratio of slenderness, spacing of transverse stiffening ribs on the embedded shell, and width-to-thickness ratio of wallboard on the anti-seismic performance of a novel box-shaped steel bridge pier. The results revealed that the load carrying capacity and ductility coefficient of the specimen are substantially influenced by the eccentricity, variation in the axial compression ratio, and slenderness ratio. The specimen’s plastic energy dissipation capacity can be effectively improved by increasing the thickness of the embedded shell. The spacing of the transverse stiffening ribs only marginally affects seismic performance. In addition, the width-to-thickness ratio of the wallboard exerts a more considerable influence on the deformability of the square-section specimen. Finally, a formula for calculating the bearing capacity of the novel box-shaped steel piers under cyclic loading is proposed.
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Abbreviations
- L :
-
Total height of the new-type bridge pier
- DS :
-
Spacing of transverse stiffening ribs
- DL :
-
Height of the energy-dissipating zone
- b :
-
Width of a box cross section
- h :
-
Height of a box cross section
- t :
-
Thickness of an embedded shell plate
- t w :
-
Thickness of a web plate
- t f :
-
Thickness of a flange plate
- t a :
-
Thickness of a fan shape stiffener
- t b :
-
Thickness of a stiffening rib
- λ z :
-
Slenderness ratio along the weak principal axis z
- n :
-
Axial compression ratio
- e :
-
Eccentric distance of load P
- h 0 :
-
Height of a web plate
- P :
-
Vertical compressed load at the top of a bridge pier
- V z :
-
Primary horizontal load applied to the top of a bridge pier
- V x :
-
Secondary horizontal load applied to the top of a bridge pier
- D z :
-
Primary loading displacement corresponding to Vz
- D x :
-
Secondary loading displacement corresponding to Vx
- A u :
-
Area of a box cross section above an energy-dissipating zone
- f y :
-
Yield strength of steel
- δ y :
-
Theoretical transverse displacement at the top of a column when the load-bearing steel yields under vertical force P and horizontal displacement Dz
- V :
-
Shearing force on a column top
- I :
-
Moment of inertia
- W :
-
Section modulus of a specimen
- M max :
-
Maximum bending moment
- M p :
-
Cross-sectional plastic bending moment, Mp = (0.5twh02+tfbh0)fy
- δ 0.85 :
-
Displacement at the top of a bridge pier corresponding to 0.85 Vz, max
- V z, max :
-
Peak load of Vz in the Vz-Dz skeleton curve
- X :
-
Relative deformation, x =δu/L
- δ u :
-
Maximum displacement at the top of a bridge pier
- N El :
-
Converted Euler force, NEl= π2EAd/λzl2
- A d :
-
Area of a box cross section in the bottom energy-dissipating zone
- λ zl :
-
Converted slenderness ratio
- E :
-
Young’s modulus
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Acknowledgement
This study was supported by the National Science Foundation of China (No. 51778248), the Natural Science Foundation of Fujian Province (No. 2018J01075), the Promotion Program for Young and Middle-aged Teachers in Science and Technology Research of Huaqiao University (No. ZQN-PY312), and the Research Trained Fund for Outstanding Young Researchers in Higher Education Institutions of Fujian Province, as well as the Project for Postgraduates’ Innovative Fund in Scientific Research of Huaqiao University (18013086021).
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National Science Foundation of China under Grant No. 51778248, Natural Science Foundation of Fujian Province under Grant No. 2018J01075, Promotion Program for Young and Middle-aged Teacher in Science and Technology Research of Huaqiao University under Grant No. ZQN-PY312, Research Trained Fund for Outstanding Young Researcher in Higher Education Institutions of Fujian Province, and Subsidized Project for Postgraduates’ Innovative Fund in Scientific Research of Huaqiao University under Grant No. 18013086021
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Wenwei, L., Haifeng, L. & Bao’an, C. Seismic performance of eccentrically-compressed steel pier under multi-directional earthquake loads. Earthq. Eng. Eng. Vib. 20, 771–789 (2021). https://doi.org/10.1007/s11803-021-2051-6
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DOI: https://doi.org/10.1007/s11803-021-2051-6