Study of strain wedge parameters for laterally loaded piles
Study of strain wedge parameters for laterally loaded piles
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DOI：
10.1061/(asce)gm.1943-5622.0000186
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发表时间：
2013-04
影响因子：
3.7
通讯作者：
M. Hajialilue-Bonab;Yones Sojoudi;A. Puppala
中科院分区：
文献类型：
--
作者：
M. Hajialilue-Bonab;Yones Sojoudi;A. Puppala
对单桩在横向荷载作用下的小比例尺物理模型进行了数值模拟和实验研究，同时从模型的侧面和顶部拍摄了单桩横向荷载作用过程中的数字图像。采用粒子图像测速技术（PIV），通过试验获得了桩周土的变形和应变，研究了桩周土的位移模式，探讨了桩长对桩周土变形模式的影响。为了研究刚性桩的土体变形规律，进行了三组刚性桩试验，得到了桩周土体的应变分布规律。基于PIV分析，建立了三维圆锥形应变楔模型。推导了应变楔方程，并进行了应力应变极限平衡分析，得到了桩的水平荷载响应。根据不同的桩和土的性质，估算了几个不同研究的桩的横向承载力，并将这些结果与实测承载力进行了比较。比较表明，与负载测量的良好协议。DOI：10.1061/（ASCE）GM.1943-5622.0000186。© 2013美国土木工程师协会。CE数据库主题标题：桩;横向荷载;土壤变形;应变;参数。作者关键词：柔性桩;侧向荷载;粒子图像测速;土体变形模式;应变楔。
Asetofsmall-scalephysicalmodelingofasinglepileunderlateralloadswasperformedinaloosesandenvironment.Digitalimages were captured during the lateral loading of the pile from the side and from the top of the model simultaneously. The particle image velocimetry (PIV)methodwasapplied,andthedeformationsofthesoilaroundthepileandthesoilstrainswereobtainedfromthesetests.Thesoildisplace- ment patternnearthesurfacearoundthepiles wasstudied,andtheeffectofthepilelengthonthesoildeformation patternwasinvestigated. The effectofpilestiffnessandwidthonsoildeformationpatternswasalsostudied.Forthestudyofsoildeformationpatternsaroundrigidpiles,three tests with rigid piles were undertaken, and strain distribution in the soil was obtained. Based on PIV analysis, a three-dimensional strain wedge with the shape of a circular cone was formulated. The equation of the strain wedge was derived, and with the stress-strain limit equilibrium analysis, the lateral load response of the pile was obtained. Lateral load capacities of several piles from different studies were estimated based on various pile and soil properties, and these results are compared with the measured capacities. Comparisons show good agreement with the load measurements. DOI: 10.1061/(ASCE)GM.1943-5622.0000186. © 2013 American Society of Civil Engineers. CE Database subject headings: Piles; Lateral loads; Soil deformation; Strain; Parameters. Author keywords: Flexible piles; Lateral loading; Particle image velocimetry (PIV); Soil deformation pattern; Strain wedge.