Analysis of Load Capacity Behaviors of Steel Fiber Reinforced Concrete Piles Through Model Tests

Abstract

Abstract: Abstract： Static load tests of concrete piles of different diameters with and without steel fiber were conducted to study the bearing capacity, the characteristics of strain, and the damage phenomenon of steel fiber reinforced concrete piles under vertical loads. Strain gauges were arranged along the longitudinal direction of the piles in order to measure the strain. Besides, a comparative analysis of the damage features between the steel fiber reinforced concrete pile and the concrete pile was conducted with the excavated piles after the completion of the tests. It is found that the compression deformation of the concrete pile can be effectively decreased with the steel fiber. The steel fiber reinforced concrete pile of the diameter equal to 7.0 cm has less compression and larger ultimate bearing capacity compared to that of the pile with the diameter equal to 4.5 cm. However, the compression and the ultimate bearing capacity vary little when the diameter of the piles changes from 7.0 cm to 8.0 cm. Moreover, the cracks or damage appear at the bottom or top of these piles, and the crack resistance of the concrete pile is improved with the steel fiber. Based on the results, some suggestions were proposed for the design of the steel fiber reinforced concrete pile.

Key words: Key words： steel fiber reinforced concrete pile, bearing capacity, strain, damage phenomenon

CLC Number:

TU 473

OUYANG Fang, ZHANG Jianjing, DENG Xiaoning, HAN Jianwei, BI Junwei, DU Lin. Analysis of Load Capacity Behaviors of Steel Fiber Reinforced Concrete Piles Through Model Tests[J]. Journal of Shanghai Jiao Tong University, 2016, 50(03): 364-369.

References

［1］陈相宇. 纤维混凝土抗冲击性能的试验研究［D］. 大连: 大连理工大学结构工程系，2010. ［2］白敏，牛荻涛，姜磊，等. 钢纤维改善混凝土力学性能和微观结构的研究［J］. 硅酸盐通报，2013，32(10): 20842089. BAI Min，NIU Ditao，Jiang Lei，et al. Research on improving the mechanical properties and microstructure of concrete with steel fiber［J］. Bulletin of the Chinese Ceramic Society，2013，32(10): 20842089. ［3］汪益敏，贺军，焦楚杰. 钢纤维混凝土复合层路面材料的力学性能［J］. 华南理工大学学报(自然科学版)，2010，38(11): 2125. WANG Yimin，HE Jun，JIAO Chujie. Mechanical performance of laminated concrete pavement materials reinforced with steel fibers［J］. Journal of South China University of Technology (Natural Science Edition)，2010，38(11): 2125. ［4］丁一宁，刘思国. 钢纤维自密实混凝土弯曲韧性和剪切韧性试验研究［J］. 土木工程学报，2010，43(11): 5563. DING YiNing，LIU SiGuo. Study of the flexural and shear toughness of steel fiber reinforced selfcompacting concrete［J］. China Civil Engineering Journal，2010，43(11): 5563. ［5］齐锋，陈晓宝，马宏旺，等. 纤维混凝土构件在温缩荷载作用下的非线性随机有限元分析［J］. 上海交通大学学报，2007，41(6): 950954. QI Feng，CHEN Xiaobao，MA Hongwang，et al. Nonlinear montecarlo fem simulation on fiber concrete under temperature drop load［J］. Journal of Shanghai Jiaotong University，2007，41(6): 950954. ［6］刘博. 复合式钢纤维混凝土路面研究［D］. 开封: 河南大学结构工程系，2013. ［7］甘立松. 隧道钢纤维混凝土单层衬砌动力响应研究［D］. 成都: 西南交通大学建筑与土木工程系，2011. ［8］朱丽英，赵源江. 钢纤维混凝土桩的设计与施工［J］. 施工技术，1995（9）: 2022. ZHU Liying，ZHAO Yuanjiang. Designation and construction of steel fiber reinforced concrete pile［J］. Construction Technology，1995（9）: 2022. ［9］РОДОВ Г С，БОΛДЫРЕВ А А，ПΛАТОНОВ Ю Н，等. 钢纤维混凝土桩［J］. 山东建筑工程学院学报， 1989(2): 6871. РОДОВ Г С，БОΛДЫРЕВ А А，ПΛАТОНОВ Ю Н，et al. Steel fiber reinforced concrete pile［J］. Constructional Engineering of Shan Dong College Journal，1989(2): 6871. ［10］陈业明. 钢纤维混凝土预制桩［J］. 工业建筑，1986(5): 6162. CHEN Yeming. Steel fiber reinforced precast concrete pile［J］. Industrial Construction，1986(5): 6162. ［11］朱丽英，赵源江. 钢纤维混凝土桩研究和应用现状［J］. 工业建筑，1995(7): 3943. ZHU Liying，ZHAO Yuanjiang. Current situation of the research and application about the steel fiber reinforced concrete pile［J］. Industrial Construction，1995(7): 3943. ［12］JGJ/T 221—2010，纤维混凝土应用技术规程［S］. ［13］GB/T 50123—1999，土工试验方法标准［S］. ［14］付文光，吴旭君，卓志飞. 有关单桩竖向抗压承载力的几个概念辨析［J］. 岩土工程学报，2013(S2): 11671171. FU Wenguang，WU Xujun，ZHUO Zhifei. Some concepts about vertical compressive bearing capacity of single pile［J］. Chinese Journal of Geotechnical Engineering，2013(S2): 11671171. ［15］汪绯，王学军，王敏. 钢纤维混凝土桩的节能效果分析［J］. 节能技术，1996(6): 1315+23. WANG Fei，WANG Xuejun，WANG Ming. Energysaving effect of steel fiber reinforced concrete pile analysis［J］. Energy Conservation Technology， 1996(6): 1315+23. ［16］赵若鹏. 混凝土破坏机理的研究［J］. 混凝土与水泥制品，1981(2): 524. ZHAO Ruopeng. Deformation failure modes of concrete analysis［J］. China Concrete and Cement Products，1981(2): 524.

[1]	ZHAO Hong, XIE Youjun, LONG Guangcheng, LI Ning, ZHANG Jiawei, CHENG Zhiqing. Mechanical Characteristics and Stress and Strain Analysis of Concrete with Bonding Interface Under Impact Load [J]. Journal of Shanghai Jiao Tong University, 2022, 56(9): 1208-1217.
[2]	LIU Jinhao, YAN Yuanzhong, ZHANG Qi, BIAN Rong, HE Lei, YE Guanlin. Centrifugal Test and Numerical Analysis of Impact of Surface Surcharge on Existing Tunnels [J]. Journal of Shanghai Jiao Tong University, 2022, 56(7): 886-896.
[3]	DUAN Hongyan, TANG Guoxin, SHENG Jie, CAO Mengjie, PEI Lei, TIAN Hongwei. A Novel Prediction Model for Fatigue Strength [J]. Journal of Shanghai Jiao Tong University, 2022, 56(6): 801-808.
[4]	ZHUANG Qianqian (庄倩倩), ZHUANG Siyue (庄似玥), GONG Yanling (龚艳玲), LI Shengtian∗ (李胜天). Chronic β-Citronellol Inhalation Rescues Parvalbumin Expression Loss in Prefrontal Cortex of Chronic Restraint Stress Mice [J]. J Shanghai Jiaotong Univ Sci, 2022, 27(4): 512-520.
[5]	GAO Bolun, LI Jian, LIU Ruiheng, LYU Shuo, ZHANG Xiaoyu, ZHANG Qingzhen. Research on Double Closed Loop Terminal Guidance Law with Terminal Angle Constraint [J]. Air & Space Defense, 2022, 5(4): 38-46.
[6]	HUO Fali∗ (霍发力), YANG Hongkun (杨宏坤), GUO Jianting (郭建廷), JI Chunyan (嵇春艳), NIU Jianjie (牛建杰), WANG Ke (王珂). Design and Overall Strength Analysis of Multi-Functional Elastic Connections Floating Breakwater System [J]. J Shanghai Jiaotong Univ Sci, 2022, 27(3): 326-338.
[7]	GUO Jiawei, XU Zhijie, HE Qichang. Design of a Virtual Assembly Gesture Library and Optimization of Ergonomics Evaluation [J]. Journal of Shanghai Jiao Tong University, 2022, 56(2): 127-133.
[8]	WU Tao, MO Shixu, XIANG Yongbin, ZOU Zequn, ZHENG Yan. Explicit Buckling Analysis of Rotationally Restrained Plates on Rigid Base Under Various Loading Conditions [J]. Journal of Shanghai Jiao Tong University, 2022, 56(1): 114-126.
[9]	REN Shufeng, YANG Dan, YU Haidong, Wang Hao. Online Motion Planning for Two Space Rigid Bodies with Rolling Constraints [J]. Journal of Shanghai Jiao Tong University, 2021, 55(8): 1009-1017.
[10]	BAI Xiaoyu (白晓宇), ZHENG Chen (郑晨), ZHANG Mingyi ∗ (张明义),LIU Xueying (刘雪颖), KUANG Zheng (匡政). Bond Mechanical Properties of Glass Fiber Reinforced Polymer Anti-Floating Anchor in Concrete Baseplate [J]. J Shanghai Jiaotong Univ Sci, 2021, 26(6): 804-812.
[11]	CHEN Peishuai, PAN Yazhou, LIANG Fayun, LI Dejie. Consolidation Characteristics and Bearing Behavior of Sand Pile Composite Foundation in Caisson Heightening [J]. Journal of Shanghai Jiao Tong University, 2021, 55(6): 707-715.
[12]	LEI Peng (雷鹏), ZHANG Congchun (张丛春), PANG Yawen (庞雅文), YANG Shenyong (杨伸勇), ZHANG Meiju (张梅菊). Fabrication and Performance Investigation of Karma Alloy Thin Film Strain Gauge [J]. J Shanghai Jiaotong Univ Sci, 2021, 26(4): 454-462.
[13]	JIN Xiaokai, CHEN Jinjian, LIAO Chencong. Wave Flume Simulation Experiment on Influence of Wave Load on Bearing Capacity of Monopile [J]. Journal of Shanghai Jiao Tong University, 2021, 55(4): 365-371.
[14]	LI Jingpei, XU Zihan. Prediction of Ultimate Bearing Capacity of Long-Term Loaded Piles [J]. Journal of Shanghai Jiao Tong University, 2021, 55(4): 380-386.
[15]	LI Tongde, YAN Huaicheng, ZHOU Ge, FAN Sha, HONG Gu. Distributed Fusion Estimation of Asynchronous Multi-Rate Multi-Sensor Network System in Navigation Guidance [J]. Air & Space Defense, 2021, 4(3): 92-98.