[1]单玉麟,黄福云,刘征峰,等.考虑台后不平衡土压力的整体式桥台H形钢桩基水平变形试验[J].长安大学学报(自然科学版),2021,41(5):66-76.
　SHAN Yu lin,HUANG Fu yun,LIU Zheng feng,et al.Horizontal deformation test of steel Hpile in integral abutmentjointless bridges (IAJBs) considering unbalanced earthpressure of backfill behind abutment[J].Journal of Chang’an University (Natural Science Edition),2021,41(5):66-76.
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考虑台后不平衡土压力的整体式桥台H形钢桩基水平变形试验()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第41卷
期数:
2021年5期
页码:
66-76
栏目:
桥梁与隧道工程
出版日期:
2021-09-15

文章信息/Info

Title:
Horizontal deformation test of steel Hpile in integral abutmentjointless bridges (IAJBs) considering unbalanced earthpressure of backfill behind abutment
作者:
单玉麟; 黄福云; 刘征峰; 罗小烨; 陈宝春
(1. 福州大学 土木工程学院,福建 福州 350108； 2. 福州大学 福建省土木工程多灾害防治重点实验室,福建 福州 350108)
Author(s):
SHAN Yulin1; 2;  HUANG Fuyun1; 2;  LIU Zhengfeng1; 2;  LUO Xiaoye1; 2;  CHEN Baochun1; 2
(1. College of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian, China; 2. Fujian ProvincialKey Laboratory on Multidisasters Prevention and Mitigation in Civil Engineering,Fuzhou University, Fuzhou 350108, Fujian, China)
关键词:
桥梁工程; 整体桥; 拟静力试验; 桥台桩土相互作用; 水平变形; 大不平衡土压力
Keywords:
bridge engineering;  integral abutment jointless bridges (IAJBs);  pseudostatic low cycle test;  soilabutmentsteel Hpile interaction;  horizontal deformation;  larger unbalanced earth pressure
文献标志码:
A
摘要:
为研究车辆重载等引起的台后大不平衡土压力对整体式桥台H形钢桩基水平变形的影响，开展了有无考虑台后大不平衡土压力影响的整体式桥台H形钢桩土相互作用拟静力试验研究，分析对比台后大不平衡土压力对桩身水平变形、滞回曲线、耗能曲线和骨架曲线等分布规律的影响。研究结果表明：在小位移荷载作用下，整体桥H形钢桩基本无累积变形，在大位移荷载作用下，桩基累积变形迅速增大；在埋深较浅范围内，设计制作的桥台H形钢桩试件（LAHP和AHP试件）均产生正向的局部累积变形，在埋深较深范围内，2个试件均产生负向的整体累积变形；台后大不平衡土压力对整体桥H形钢桩基的水平变形、累积变形、单步位移荷载下的水平变形、滞回曲线、耗能曲线和骨架曲线均产生较大的影响；在埋深较浅范围内，LAHP与AHP试件的桩身水平变形、累积变形和单步位移荷载下的水平变形存在显著差异，LAHP试件的正、负向不平衡力和正向累积变形均小于AHP试件的，但负向累积变形和等效黏滞阻尼系数均大于AHP试件的。
Abstract:
In order to study effect of vehicle load causing unbalanced earth pressure of backfill behind abutment on horizontal deformation of steel Hpile in integral abutment jointless bridges (IAJBs), several reciprocating lowcycle pseudostatic tests on soilabutmentsteel Hpile interaction with or without considering the effect of unbalanced earth pressure of backfill behind abutment were carried out. A comparative study was performed to find the effect of larger unbalanced earth pressure on horizontal deformation, accumulative deformation, horizontal deformation under single step displacement loading, hysteresis, energy and skeleton curves of pile. The results show that the steel Hpile in IAJBs has no accumulative deformation basically under small displacement loading. The accumulative deformation of pile foundation increases under large displacement loading. In addition, the LAHP and AHP specimens induce positive local accumulative deformation in the shallow depth range. They induce the overall negative accumulative deformation in the deeper depth range. The larger unbalance earth pressure of backfill behind abutment has an important effect on horizontal deformation, accumulative deformation, horizontal deformation under single step displacement loading, hysteresis, energy and skeleton curves of steel Hpile in IAJBs. Among on, the horizontal deformation, accumulative deformation, horizontal deformation under single step displacement loading of AHP and LAHP specimens are significant differences in the shallow depth range. In addition, the positive and negative unbalance force and positive accumulative deformation of LAHP specimen are less than those of AHP specimen. However, the negative accumulative deformation and equivalent viscous damping coefficient are larger than those of AHP specimen. 2 tabs, 14 figs, 32 refs.

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更新日期/Last Update: 2021-09-30