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学者姓名：张峰
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Abstract ：
A styrene-butadiene-styrene (SBS) modified asphalt compound was prepared by the addition of polyphosphoric acid (PPA) and sulfur. The effect of PPA and sulfur on major physical properties, including toughness and tenacity, aging resistance, and storage stability was investigated. The structural characteristics of SBS-modified (SM) asphalt, SBS/PPA-modified (SPM) asphalt, and SBS/PPA/sulfur-modified (SPSM) asphalt were investigated using scanning electron microscopy (SEM), gel filtration chromatography (GPC), and thermal analysis. It has been found that acidification prompted the clustering of SBS particles and confined the swelling of SBS, making SPM asphalt more susceptible to aging. Vulcanization changed the morphological characteristics of SBS in asphalt, improved the compatibility between SBS and asphalt, and weakened the aging susceptibility. Therefore, it is reasonable to modify SM asphalt by using PPA and sulfur together.
Keyword ：
asphalt asphalt polyphosphoric acid polyphosphoric acid styrene-butadiene-styrene styrene-butadiene-styrene sulfur sulfur
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| GB/T 7714 | Zhang, Feng , Li, Lei . Effect mechanism of acidification and vulcanization on SBS-modified asphalt [J]. | INTERNATIONAL POLYMER PROCESSING , 2022 , 37 (5) : 559-567 . |
| MLA | Zhang, Feng 等. "Effect mechanism of acidification and vulcanization on SBS-modified asphalt" . | INTERNATIONAL POLYMER PROCESSING 37 . 5 (2022) : 559-567 . |
| APA | Zhang, Feng , Li, Lei . Effect mechanism of acidification and vulcanization on SBS-modified asphalt . | INTERNATIONAL POLYMER PROCESSING , 2022 , 37 (5) , 559-567 . |
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Research purposes: Semi-integral abutment jointless bridge (SAJB) is a new type of bridge structure. Due to the rigid connection of main girder and abutment, the main girder will induce the bridge abutment to undergo reciprocating displacement along the longitudinal bridge direction, which results the changes of soil resistance behind the abutment under the long-term effects of diurnal and seasonal ambient temperature. In order to study the distribution law of the soil resistance behind the abutment and the influence of the medium long-term ambient temperature on it, a quasi-static test of the semi-integral abutment-soil interaction was carried out under medium and long-term ambient temperature. Research conclusions:(1) The soil resistance with the ambient temperature rises rapidly in the 1st to 6th middle period (the first warming interval from spring to summer), then decrease in the 6th to 16th middle period (the period from summer to summer). In the 16th to 20th middle period (the second warming interval from winter to spring), it starts to increase again, but the increase rate is slightly slow compared to the first warming interval. (2) The soil resistance along the buried depth increases firstly until reaching the maximum at the buried depth of 0.8h, and then decreases under the medium long-term ambient temperature. (3) The law of soil resistance along longitudinal direction in each period is that in the area near the abutment, the soil resistance decreases rapidly; while in the area far away from the abutment, the soil resistance decreases slowly to 0 at the position 1.0h away from the abutment. (4) After a large period of ambient temperature, the soil resistance behind the abutment has a significant cumulative increasing effect, and its cumulative effect has a strong correlation with the longitudinal position and vertical depth of the soil. (5) The research results can provide references for the design of semi-integral bridges and the formulation of related specifications. © 2022, Editorial Department of Journal of Railway Engineering Society. All right reserved.
Keyword ：
Abutments (bridge) Abutments (bridge) Beams and girders Beams and girders Soils Soils Temperature Temperature
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| GB/T 7714 | Huang, Fuyun , Zhou, Zhiming , Song, Dadong et al. Experiment on the Soil Resistance behind Abutment of Semi-integral Abutment Jointless Bridge under Ambient Temperature [J]. | Journal of Railway Engineering Society , 2022 , 39 (1) : 47-55 . |
| MLA | Huang, Fuyun et al. "Experiment on the Soil Resistance behind Abutment of Semi-integral Abutment Jointless Bridge under Ambient Temperature" . | Journal of Railway Engineering Society 39 . 1 (2022) : 47-55 . |
| APA | Huang, Fuyun , Zhou, Zhiming , Song, Dadong , Yan, Aiguo , Zhang, Feng . Experiment on the Soil Resistance behind Abutment of Semi-integral Abutment Jointless Bridge under Ambient Temperature . | Journal of Railway Engineering Society , 2022 , 39 (1) , 47-55 . |
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In order to study the effect of mechanical behavior of steel H-pile foundation in integral abutment jointless bridges (IAJBs) by unbalanced earth pressure and asymmetric loading, several reciprocating low-cycle pseudo-static tests on studying the soil-steel H-pile interaction were carried out under symmetric conditions (both balance earth pressure and symmetric loading), only unbalance earth pressure (symmetric loading) and completely asymmetric conditions (both unbalance earth pressure and asymmetric loading), respectively. A comprehensively comparative study was performed to find their behaviors in terms of horizontal deformations, soil resistance, strain, and bending moment of piles. The test results indicate that the horizontal deformation of positive loading is significantly different from that of negative loading under completely asymmetric conditions. In addition, the soil resistance and bending moment of the pile are significantly larger than those of negative loading under positive loading. The unbalance earth pressure and asymmetric loading have a significant impact on the horizontal deformations, soil resistance, and the bending moment of the pile. Among them, the unbalance earth pressure induces the overall negative accumulative deformation and increases the soil resistance and the bending moment of the pile. The positive asymmetric loading decreases the horizontal deformation but increases the soil resistance and bending moment of the pile. The negative asymmetric loading decreases the horizontal deformation, soil resistance and bending moment of the pile. © 2022, Editorial Department of Journal of Hunan University. All right reserved.
Keyword ：
Abutments (bridge) Abutments (bridge) Bending moments Bending moments Piles Piles Pressure distribution Pressure distribution Retaining walls Retaining walls Soils Soils
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| GB/T 7714 | Shan, Yulin , Huang, Fuyun , Luo, Xiaoye et al. Pseudo-static Test on Interaction of Soil-Steel H-pile in Integral Abutment Jointless Bridges (IAJBs) under Asymmetric Conditions [J]. | Journal of Hunan University Natural Sciences , 2022 , 49 (3) : 175-186 . |
| MLA | Shan, Yulin et al. "Pseudo-static Test on Interaction of Soil-Steel H-pile in Integral Abutment Jointless Bridges (IAJBs) under Asymmetric Conditions" . | Journal of Hunan University Natural Sciences 49 . 3 (2022) : 175-186 . |
| APA | Shan, Yulin , Huang, Fuyun , Luo, Xiaoye , Zhang, Feng , Chen, Baochun . Pseudo-static Test on Interaction of Soil-Steel H-pile in Integral Abutment Jointless Bridges (IAJBs) under Asymmetric Conditions . | Journal of Hunan University Natural Sciences , 2022 , 49 (3) , 175-186 . |
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Abstract ：
为研究强震和温度作用下,整体桥台产生的水平往复大位移对桥台与台后填土相互作用的影响,进行了整体桥台-H形钢桩-土相互作用拟静力试验,并基于试验结果研究了大位移作用下整体桥台后土压力的分布规律;根据台后土压力分布,提出了台后土压力合力作用点位置与加载位移之间的关系式,并在现有研究的基础上给出了改进的整体桥台后土压力计算方法.研究结果表明:正向加载(桥台挤压台后土)时,台后各处土压力随加载位移的增加先增大后减小;台背处和台后20％桥台高度处土压力受桥台位移的影响更大,沿深度方向呈梯形分布;台背处土压力分布中,由于台底H形钢桩的约束,最大土压力位于入土深度0.875 m处,台底位置的土压力则略有减小;台后60％桥台高度和1.4倍桥台高度处土压力受桥台位移影响较小,沿深度方向呈三角形分布;负向加载(桥台背离台后土)时,台后土压力沿深度方向呈三角形分布,且台后各处土压力与加载位移不相关,其值相对于正向加载时可忽略;水平往复大位移作用下,整体桥台后土会产生脱空现象,脱空范围超过桥台高度的37.5％;台后土压力沿纵桥向呈指数型衰减,且相比小位移作用下衰减得更快;台后土压力合力作用点位置随加载位移的增大而逐渐降低,且台后土压力系数与加载位移具有明显的非线性关系,呈现先增大后减小的规律;现有土压力计算方法未考虑桥台位移的影响或认为台后土压力在桥台发生小位移时随桥台位移的增大而增大,发生大位移时则基本不变;提出的土压力拟合公式的判定系数为0.92,计算值与试验值的相对误差为6.2％,可作为现有土压力计算方法的有益补充.
Keyword ：
台后土压力 台后土压力 抗震性能 抗震性能 拟静力 拟静力 整体桥 整体桥 桥梁工程 桥梁工程 计算方法 计算方法
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| GB/T 7714 | 李岚 , 黄福云 , 张峰 et al. 水平往复大位移作用下整体桥台后土压力计算方法 [J]. | 交通运输工程学报 , 2022 , 22 (5) : 173-183 . |
| MLA | 李岚 et al. "水平往复大位移作用下整体桥台后土压力计算方法" . | 交通运输工程学报 22 . 5 (2022) : 173-183 . |
| APA | 李岚 , 黄福云 , 张峰 , 刘征峰 , 陈伟 . 水平往复大位移作用下整体桥台后土压力计算方法 . | 交通运输工程学报 , 2022 , 22 (5) , 173-183 . |
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To analyze the effect of horizontal reciprocating large displacement generated by the abutment on the interaction between the abutment and the backfill behind the abutment under the actions of strong earthquake and temperature, a quasi-static test for the interaction among the integral abutment, H-shaped steel pile, and soil was carried out. On the basis of the test results, the distribution law of the earth pressure behind the integral abutment under the action of large displacement was studied. According to the distribution of the earth pressure behind the abutment, the relational expression between the action point location of the resultant earth pressure behind the abutment and the loading displacement was proposed, and an improved calculation method for the earth pressure behind the integral abutment was given based on the existing research. Research results indicate that when the abutment is loaded in the positive direction (the abutment squeezes the soil behind the abutment), the earth pressure behind the abutment first increases and then decreases as the loading displacement rises. Earth pressures at the abutment back and 20% of the abutment height behind the abutment are highly affected by the abutment displacement and has a trapezoidal distribution along the depth direction. In the earth pressure distribution at the abutment back, due to the constraint of H-shaped steel pile at the bottom of the abutment, the maximum earth pressure is located at a depth of 0.875 m, and the earth pressure at the bottom of the abutment decreases slightly. Earth pressures at 60% of the abutment height and 1.4 times the abutment height behind the abutment are less affected by the abutment displacement and is triangularly distributed along the depth direction. When the abutment is loaded in the negative direction (the abutment deviates from the soil behind the abutment), the earth pressure behind the abutment is triangularly distributed along the depth direction, and the earth pressure behind the abutment has no connection with the loading displacement, and its value can be neglected relative to the positive loading. Under the action of a horizontal reciprocating large displacement, the soil behind the integral abutment will face a void phenomenon, and the void range will exceed 37.5% of the abutment height. The earth pressure behind the abutment reduces exponentially along the longitudinal direction, and it reduces faster than that under the action of a small displacement. The action point location of the resultant earth pressure behind the abutment decreases gradually as the loading displacement increases, and the earth pressure coefficient behind the abutment has an obvious nonlinear relationship with the loading displacement, which is reflected by the law of first increasing and then decreasing. Existing earth pressure calculation methods do not take into account the effect of the abutment displacement or consider that the earth pressure behind the abutment rises with the increase in the abutment displacement when small displacements occur and remains basically unchanged when large displacements occur. The determination coefficient of the proposed earth pressure fitting formula is 0.92, and the relative error between the calculated value and the test value is 6.2%, which can be a useful supplement to the existing earth pressure calculation methods. © 2022 Chang'an University. All rights reserved.
Keyword ：
Abutments (bridge) Abutments (bridge) Piles Piles Pressure distribution Pressure distribution Retaining walls Retaining walls Seismology Seismology Soils Soils
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| GB/T 7714 | Li, Lan , Huang, Fu-Yun , Zhang, Feng et al. Calculation method for earth pressure behind integral abutment under horizontal reciprocating large displacement [J]. | Journal of Traffic and Transportation Engineering , 2022 , 22 (5) : 173-183 . |
| MLA | Li, Lan et al. "Calculation method for earth pressure behind integral abutment under horizontal reciprocating large displacement" . | Journal of Traffic and Transportation Engineering 22 . 5 (2022) : 173-183 . |
| APA | Li, Lan , Huang, Fu-Yun , Zhang, Feng , Liu, Zheng-Feng , Chen, Wei . Calculation method for earth pressure behind integral abutment under horizontal reciprocating large displacement . | Journal of Traffic and Transportation Engineering , 2022 , 22 (5) , 173-183 . |
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Abstract ：
The integral abutment jointless bridge (IAJB) has advantages such as long service life, convenient construction, lower cost of building, and maintenance. Currently, it is widely used globally. A test model of an integral abutment-pile foundation structure was designed and manufactured based on a practical IAJB. The pseudo-static test under low-cycle reciprocating displacement load was conducted to study the interactions between the integral abutment-H-shaped steel pile and soil. Then, the strain, bending moment as well as shear force of the abutment and the pile foundation were mainly studied. The experimental results show that the strain distribution of the pile body is in the shape of a cup when the abutment moves to backfill positively, while it is in the shape of an olive when the abutment moves negatively. Moreover, the maximum compressive stress and tensile stress under the positive displacement load are greater than those under the negative load. Therefore, the internal force of the pile foundation, when the temperature increases, is greater than when the temperature drops, indicating that the H-shaped steel pile foundation is more adversely affected when the temperature rises in the summer months. It is suggested that the overall bridge closure temperature should be slightly higher than the annual average temperature to reduce the adverse impact on the pile foundation resulting from high temperatures. Additionally, the calculation also shows that when the negative load is applied, the bending moment and shear force of the pile body calculated by these methods deviate marginally from the test results, and the distribution law is similar to that of the traditional pile foundation. However, in the case of positive loading, the pile bending moment and shear force calculated, using these theories behind the abutment or the bridge specification, deviate considerably from the test results, and the distribution law is different from that of the traditional pile foundation. In this paper, the method of polynomial fitting and Huang- Lin can be more accurately calculated the integral abutment pile-soil interaction of bending moment and shear force. This method can be used in practical engineering to calculate the internal force of the abutment and the pile of the integral bridge and form a frame of reference for the design and application of integral bridges in the future. © 2021, Editorial Department of China Journal of Highway and Transport. All right reserved.
Keyword ：
Abutments (bridge) Abutments (bridge) Bending moments Bending moments Loads (forces) Loads (forces) Pile foundations Pile foundations Piles Piles Soils Soils Steel beams and girders Steel beams and girders Structural design Structural design
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| GB/T 7714 | Huang, Fu-Yun , Zhang, Feng , Shan, Yu-Lin et al. Calculation Method of Internal Force of Integral Abutment Pile Foundation-soil Interaction [J]. | China Journal of Highway and Transport , 2021 , 34 (6) : 69-79 . |
| MLA | Huang, Fu-Yun et al. "Calculation Method of Internal Force of Integral Abutment Pile Foundation-soil Interaction" . | China Journal of Highway and Transport 34 . 6 (2021) : 69-79 . |
| APA | Huang, Fu-Yun , Zhang, Feng , Shan, Yu-Lin , Lin, You-Wei , Zhou, Zhi-Ming . Calculation Method of Internal Force of Integral Abutment Pile Foundation-soil Interaction . | China Journal of Highway and Transport , 2021 , 34 (6) , 69-79 . |
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Polyphosphoric acid (PPA) was used to improve the performances of styrene-butadienestyrene (SBS) modified (SM) asphalt mixture further and decline the SBS content, however the negative effect of PPA on the performances of SM asphalt mixture is still unclear. The major purpose of this paper is to indicate the negative effect and provide an efficient way to solve the problem. In this paper, SM asphalt, SBS/PPA-modified asphalt (SPMA), SBS/PPA/sulfur-modified asphalt (SPSMA) were prepared, the physical properties were studied and the morphology was investigated by using scanning electron microscope (SEM). The mixtures of base asphalt (BA), SM asphalt, SPMA, SPSMA were designed and prepared in the light of Superpave mixing design method and Phoenix specifications. Universal testing machine (UTM) system was used to investigate the effect of SBS, PPA, sulfur on the properties of BA mixture. It was found that PPA declined the crack, fatigue resistance and moisture susceptibility of SM asphalt mixture and the problem can be solved well by vulcanization, the morphology change of SBS from coarse particle to threadlike one after vulcanization prompted the swelling of SBS in asphalt. Therefore SBS compound modified asphalt pavement material with better performances and lower cost can be prepared by taking advantage of acidification and vulcanization. (C) 2021 Elsevier Ltd. All rights reserved.
Keyword ：
Asphalt mixture Asphalt mixture Polyphosphoric acid (PPA) Polyphosphoric acid (PPA) Styrene-butadiene-styrene (SBS) Styrene-butadiene-styrene (SBS) Sulfur Sulfur Universal testing machine (UTM) Universal testing machine (UTM)
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| GB/T 7714 | Zhang, Feng , Kaloush, Kamil , Underwood, Shane et al. Preparation and performances of SBS compound modified asphalt mixture by acidification and vulcanization [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2021 , 296 . |
| MLA | Zhang, Feng et al. "Preparation and performances of SBS compound modified asphalt mixture by acidification and vulcanization" . | CONSTRUCTION AND BUILDING MATERIALS 296 (2021) . |
| APA | Zhang, Feng , Kaloush, Kamil , Underwood, Shane , Hu, Changbin . Preparation and performances of SBS compound modified asphalt mixture by acidification and vulcanization . | CONSTRUCTION AND BUILDING MATERIALS , 2021 , 296 . |
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整体桥因其全周期寿命长、整体性好和养护费用低等特点,得到了广泛应用,但对其在地震荷载作用下的受力特点和变形规律还缺乏深入研究.基于此,以某整体桥为背景,制作桥台-H形钢桩试验模型,开展整体式桥台-H形钢桩-土体系抗震性能拟静力试验研究,分析桥台-H形钢桩的破坏模式、滞回性能、骨架曲线、水平变形和桥台转角等变化规律.试验结果表明:H形钢桩出现较大的负向残余变形,但负向加载下H形钢桩未出现破坏;台后、台底及桩顶土体均出现大范围脱空;试件的等效黏滞阻尼比约为0.35,具有良好的耗能能力;正向加载下试件的弹性抗弯刚度是负向的12.6倍,最大承载力是负向的3.85倍,台后土对试件的刚度和承载力影响显著;破坏时试件刚度减小至初始刚度的33％,退化不显著;相比位移延性和割线刚度,采用环线刚度分析其抗震性能更为合适,改进后的割线刚度能更准确地反映试件的刚度退化;考虑整体和局部累积变形的影响,大加载位移作用下,桩身出现较大的负向整体累积变形,且桩身沿深度方向多处出现局部累积变形;加载过程桥台仅发生刚体位移,正向转角逐渐增大,负向转角先增大后减小再转为正向倾斜.研究发现整体式桥台-H形钢桩-土体系拥有优越的抗震性能.
Keyword ：
H形钢桩 H形钢桩 抗震性能 抗震性能 拟静力试验 拟静力试验 整体桥 整体桥 桥台-桩-土相互作用 桥台-桩-土相互作用 桥梁工程 桥梁工程 累积变形 累积变形
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| GB/T 7714 | 黄福云 , 陈伟 , 徐普 et al. 整体式桥台-H形钢桩-土体系抗震性能试验 [J]. | 中国公路学报 , 2020 , 33 (9) : 180-192 . |
| MLA | 黄福云 et al. "整体式桥台-H形钢桩-土体系抗震性能试验" . | 中国公路学报 33 . 9 (2020) : 180-192 . |
| APA | 黄福云 , 陈伟 , 徐普 , 薛俊青 , 张峰 . 整体式桥台-H形钢桩-土体系抗震性能试验 . | 中国公路学报 , 2020 , 33 (9) , 180-192 . |
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本实用新型涉及一种适用于新型大跨度整体桥台后填料装置，其中适用于新型大跨度整体桥台后填料装置包括桥台和设在桥台上的顶梁，以及设在桥墩与顶梁之间的主梁，在远离桥墩的一侧设有枕梁和设在枕梁与顶梁之间的搭板，所述搭板的下方且靠近于桥台的侧面铺设有弹性材料和自下而上间隔设在弹性材料中的波纹状金属板，所述搭板的下方充填有台后土；将波形金属板与桥台相连，在波纹状金属板间隙处填充弹性材料如橡胶颗粒等，从而减少上部结构伸长时的台后被动土压力和上部结构收缩时的主动土压力，防止填土的脱空和下陷。本实用新型设计合理，构造简单，施工方便，对于整体桥减少台后土压力及避免填土脱空和下陷能起到良好的效果。
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| GB/T 7714 | 黄福云 , 单玉麟 , 刘征峰 et al. 适用于新型大跨度整体桥台后填料装置 : CN202021565516.8[P]. | 2020-07-31 . |
| MLA | 黄福云 et al. "适用于新型大跨度整体桥台后填料装置" : CN202021565516.8. | 2020-07-31 . |
| APA | 黄福云 , 单玉麟 , 刘征峰 , 张峰 , 何凌峰 . 适用于新型大跨度整体桥台后填料装置 : CN202021565516.8. | 2020-07-31 . |
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本发明涉及一种加强桩台连接的构造及其施工方法，包括桥梁桩基和刚性连接在桥梁桩基顶部的桥台，所述桥梁桩基的上端套设有钢套管，所述钢套管的上端固联有钢顶板，所述钢顶板的顶面与桥台的底面相贴合，钢顶板与桥台之间通过剪力键现场浇筑连接，所述钢顶板、钢套管以及桥梁桩基的顶面相齐平。本发明结构简单、合理，施工方便，能够改善桥梁桩基与桥台连接处混凝土的受力状态，提高桥梁安全性和抗震性，延长使用寿命，具有重要的实际意义和工程应用价值。
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| GB/T 7714 | 黄福云 , 陈伟 , 张峰 et al. 一种加强桩台连接的构造及其施工方法 : CN201910228122.9[P]. | 2019/3/25 . |
| MLA | 黄福云 et al. "一种加强桩台连接的构造及其施工方法" : CN201910228122.9. | 2019/3/25 . |
| APA | 黄福云 , 陈伟 , 张峰 , 林友炜 , 胡晨曦 , 刘名琦 . 一种加强桩台连接的构造及其施工方法 : CN201910228122.9. | 2019/3/25 . |
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