| 整体式桥台-H形钢桩-土相互作用低周往复拟静力试验（双语出版） |
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| 引用本文： | 黄福云,林友炜,程俊峰,杨芳芳.整体式桥台-H形钢桩-土相互作用低周往复拟静力试验（双语出版）[J].中国公路学报,2019,32(5):100-114. |
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| 作者姓名： | 黄福云 林友炜 程俊峰 杨芳芳 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金项目（51578161） |
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| 摘 要： | 整体桥具有使用寿命长、施工方便、造价及养护费用低等特点，目前在国内外得到了广泛应用与推广。然而，整体桥在季节性温度荷载作用下会发生往复位移，并产生桥台-桩基-土相互作用。为此，以福建上坂大桥为背景，设计制作桥台-桩基结构试验模型，开展桥台-H形钢桩基-土相互作用低周往复荷载拟静力试验研究，主要研究桥台、桩基的滞回性能与变形规律以及桥台-桩基-土三者相互作用的机理。结果表明：桥台与桩基的等效黏滞阻尼比均较大，其值大于0.15，即整体桥具有良好的抗震性能和耗能能力；整体桥在温度作用下桩基处于弹性状态，但会发生残余变形，同时在台背与桩顶的一定宽度和深度范围内存在土体脱空现象，实际工程中产生桥头跳车、搭板沉降的原因不仅与台后土体的特性相关，还与桥台结构的受力机理相关；仅测量和分析上部未入土结构的变形并不能准确反映整体结构的变形规律；试验循环加载全过程桥台-桩基-土相互作用会产生累积变形，其中桩基的累积变形要大于桥台的累积变形，且其累积变形远大于任意单步荷载作用下产生的变形；目前对于现有桥台-桩基变形的理论并未考虑累积变形的影响，该研究结果可为有关规范的制订提供参考。
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| 关 键 词： | 桥梁工程 H形钢桩 试验研究 桥台-桩-土相互作用 拟静力 温度作用 残余变形累积 |
| 收稿时间： | 2018-05-07 |
Interaction of Integral Abutment-H-shaped Steel Pile-soil Under Reciprocating Low-cycle Pseudo-static Test（in English） |
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| HUANG Fu-yun,LIN You-wei,CHENG Jun-feng,YANG Fang-fang.Interaction of Integral Abutment-H-shaped Steel Pile-soil Under Reciprocating Low-cycle Pseudo-static Test（in English）[J].China Journal of Highway and Transport,2019,32(5):100-114. |
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| Authors: | HUANG Fu-yun LIN You-wei CHENG Jun-feng YANG Fang-fang |
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| Affiliation: | 1. School 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 |
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| Abstract: | The integral abutment jointless bridge (IAJB) has a long service life, convenient construction, and less building and maintenance costs. For these advantages, the IAJB has been widely used in foreign and domestic practical engineering. However, reciprocating displacement of the IAJB occurs under seasonal temperature loads, and the abutment-pile-soil interaction is produced. Thus, an abutment-pile structural test model was designed and manufactured based on Fujian Shangban Bridge. Using the model, the reciprocating low-cycle pseudo-static test was carried out for the integral abutment-H-shaped steel pile-soil interaction. The hysteretic behavior, lateral deformation law, and interactive mechanism of integral abutment-pile-soil were studied. The results indicate that the equivalent damping ratio of abutment and pile is more than 0.15, suggesting that the IAJB has a favorable seismic performance. The pile of an IAJB is in the elastic stage under the local temperature effect; however, it carries a residual deformation. The cavitation of soil for a range of widths and depths of the pile head/abutment bottom, and void phenomenon of backfill at abutment can be observed. The cause of bumps at the bridge ends and the settlement under approach slab not only relate to the backfill properties of abutment but also to the behavioral mechanism of the abutment structure and soil. In addition, when simply measured and analyzed, the deformation over the surface of the pile cannot accurately demonstrate the distribution of lateral deformation. The accumulative deformation of the abutment-pile-soil interaction was examined, and it is determined that the accumulative deformation on the pile is larger than that of the abutment. Moreover, the overall accumulative deformation is larger than that produced by the individual load steps. Presently, the existing theory for calculating the lateral deformation of abutment-pile foundation does not take into account the impact of accumulative deformation. Thus, this study may serve as a reference for the relevant construction codes. |
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| Keywords: | bridge engineering H-shaped steel pile experimental research interaction of abutment-pile-soil pseudo-static temperature effect residual accumulative deformation |
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