| 摘要: |
| 为研究土工格室整体抗拉承载力与条带抗拉承载力、节点抗拉承载力之间的力学响应关系，采用双轴拉伸试验测定了不同高度、焊距的高强土工格室在不同加载速度下的破坏承载力；利用节点抗拉承载力与条带抗拉承载力之间的匹配关系，给出了土工格室抗拉承载力的设计参考值；采用响应面多因素试验分析法，研究了土工格室双轴拉伸承载力和变形对各影响因素的响应规律.结果表明：双轴拉伸试验中高强土工格室的破坏均发生在节点处，工程设计时应重点关注；对土工格室整体抗拉承载力的影响程度由大到小为土工格室高度>土工格室焊距>加载速度，研究结果可以为工程设计中土工格室的技术指标选择提供理论依据. |
| 关键词: 土工格室 双轴拉伸 力学响应 突变台阶 响应面 |
| DOI：10.3969/j.issn.1007-9629.2021.06.030 |
| 分类号:TU43 |
| 基金项目:国家自然科学基金资助项目（51669031）；新疆交通设计院科研基金（KY2019092504） |
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| Tensile Properties of Polypropylene High Strength Geocell Based on Response Surface Method |
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ZHANG Bingbing1, LIU Jie1,2, AKENJIANG Tuohuti1, WANG Bin2, CHEN Shi3
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1.College of Architectural Engineering， Xinjiang University， Urumqi 830047， China;2.Xinjiang Transportation Planning， Survey and Design Institute， Urumqi 830006， China;3.Lanzhou Deke Engineering Materials Co.， Ltd.， Lanzhou 730030， China
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| Abstract: |
| To study the mechanical response relationship between the overall tension of geocell and the tension of geocell strips and nodes， the biaxial tensile test was used to measure the maximum breaking tension of high-strength geocell with different heights and different cell welding pitches when they were tested at different loading velocity. The design reference value of geocell tension was given by using the matching relationship between node strength and strip tension. The response law of the biaxial tension and deformation of the geocell to various influencing factors was studied by the response surface multi-factor test analysis method. The results show that the failures of the high-strength geocell in the biaxial tensile test all occur at the nodes， and the actual engineering design should be paid attention. The degree of influence of the three factors on the overall strength of the geocell is geocell height>geocell weld pitch>loading velocity， the research results can provide a theoretical basis for the technical index selection of the geocell in engineering design. |
| Key words: geocell biaxial tensile mechanical response abrupt step response surface |
