Quasi-static test on H-shaped steel-RC stepped pile-soil interaction of integral bridge

被引：0
|
作者：
Zhuang Y.-Z. [1 ]
Song K.-S. [1 ]
Song Y.-Q. [2 ]
Chen G.-D. [2 ]
Huang F.-Y. [2 ]
Chen L. [1 ]
机构：
[1] College of Civil Engineering, Zhejiang University of Technology, Zhejiang, Hangzhou
[2] College of Civil Engineering, Fuzhou University, Fujian, Fuzhou
来源：
Jiaotong Yunshu Gongcheng Xuebao/Journal of Traffic and Transportation Engineering | 2022年 / 22卷 / 05期
基金：
中国国家自然科学基金;
关键词：
bridge engineering; finite element analysis; H-shaped steel pile; H-shaped steel-RC stepped pile; integral bridge; pile-soil interaction; quasi-static test;
D O I：
10.19818/j.cnki.1671-1637.2022.05.008
中图分类号：
学科分类号：
摘要：
On the basis of H-shaped steel-RC stepped pile model tests, the quasi-static tests of 2 H-shaped steel-RC stepped piles (HS-RC-0.25, HS-RC-0.50) and an H-shaped steel (HS) pile under the low cyclic repeated loading were carried out. A horizontal displacement load was applied on the pile top, and the strain and soil pressure gauges were embedded, a specially designed test method for the horizontal displacement of the pile body was adopted, and the failure characteristics of the HS-RC stepped pile, the horizontal displacement and strain of the pile body along the pile depth, skeleton curve, and hysteretic behavior curve were obtained. The horizontal displacement abilities of the stepped pile top under free and fixed conditions were compared and analyzed by OpenSEES. The reduction coefficient and conversion coefficient of the horizontal bearing capacity of the stepped pile were obtained, and the calculated value obtained by the reduction coefficient and test value of horizontal bearing capacity of the model pile were compared. Test results show that the elastic deformation range of the pile top of the HS pile is 2-25 mm, and the pile has strong horizontal deformation ability, positive bearing capacity, full hysteresis loop during the whole loading process, and excellent energy consumption effect. The stiffness ratio has no significant effect on the failure mode of the stepped pile. The upper steel pile of the stepped pile has no apparent buckling failure, and the concrete at the variable section is seriously peeled off with the same failure position. With the increase in the stiffness ratio, the yield displacement and yield load of the stepped pile-soil system increase. Compared with that of HS-RC-0.50, the yield displacement of HS-RC-0.25 decreases by 29.15%, and the strain mutation of the pile body decreases. The hysteresis loop of the stepped pile is pinched at the initial loading stage due to slip and becomes spindle-shaped at the later loading stage. The energy consumption effect is positive, and the energy consumption of HS-RC-0.50 during the whole loading process is 25.4% more than that of HS-RC-0.25, which shows an excellent horizontal deformation ability. Compared with the experimental value, the calculation error of HS-RC-0.25 is -9.68%, while the calculation error of HS-RC-0.50 is -2.47%. The HS-RC stepped pile can meet the horizontal deformation requirements of the integral abutment bridge pile foundation, and the reduction coefficient can be used to better calculate the stepped pile's horizontal bearing capacity characteristic value. © 2022 Chang'an University. All rights reserved.
引用
收藏
页码：145 / 162
页数：17
相关论文
共 30 条
  • [1] HUANG Fu-yun, SHAN Yu-lin, LUO Xiao-ye, Et al., Displacement-based seismic design criteria of concrete piles in integral abutment jointless bridges, China Journal of Highway and Transport, 34, 5, pp. 99-109, (2021)
  • [2] WHITE H, PETURSSON H, COLLIN P., Integral abutment bridges: the European way, Practice Periodical on Structural Design and Construction, 15, 3, pp. 201-208, (2010)
  • [3] KUNIN J, ALAMPALLI S., Integral abutment bridges: current practice in United States and Canada, Journal of Performance of Constructed Facilities, 14, 3, pp. 104-111, (2000)
  • [4] AL-ANI M, MURASHEV A, PALERMO A, Et al., Criteria and guidance for the design of integral bridges, Proceedings of the Institution of Civil Engineers Bridge Engineering, 171, 3, pp. 143-154, (2018)
  • [5] LAFAVE J M, BRAMBILA G, KODE U, Et al., Field behavior of integral abutment bridges under thermal loading, Journal of Bridge Engineering, 26, 4, (2021)
  • [6] DUNKER K F, LIU D., Foundations for integral abutments, Practice Periodical on Structural Design and Construction, 12, 1, pp. 22-30, (2007)
  • [7] LUO Xiao-ye, CHEN Bao-chun, HUANG Fu-yun, Et al., Mechanical property of integral bridge supported by different types of pile foundations, Journal of Architecture and Civil Engineering, 37, 5, pp. 151-160, (2020)
  • [8] KONG B, CAI C S, ZHANG Y., Parametric study of an integral abutment bridge supported by prestressed precast concrete piles, Engineering Structures, 120, pp. 37-48, (2016)
  • [9] BAKROON M, DARYAEI R, AUBRAM D, Et al., Numerical evaluation of buckling in steel pipe piles during vibratory installation, Soil Dynamics and Earthquake Engineering, 122, pp. 327-336, (2019)
  • [10] FAR N E, MALEKI S, BARGHIAN M., Design of integral abutment bridges for combined thermal and seismic loads, Earthquakes and Structures, 9, 2, pp. 415-430, (2015)
123