| STS管幕结构横向抗弯刚度计算模型及参数优化 |
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| 引用本文： | 贾鹏蛟,史培新,关永平,赵文.STS管幕结构横向抗弯刚度计算模型及参数优化[J].东北大学学报(自然科学版),2021,42(8):1159-1165. |
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| 作者姓名： | 贾鹏蛟 史培新 关永平 赵文 |
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| 作者单位： | (1. 苏州大学 轨道交通学院， 江苏 苏州215000; 2. 东北大学 资源与土木工程学院， 辽宁 沈阳110819; 3. 沈阳建筑大学 交通工程学院， 辽宁 沈阳110168) |
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| 基金项目： | 国家自然科学基金资助项目(51878127). |
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| 摘 要： | STS (steel tube slab)管幕工法是一种新型的地铁暗挖支护体系，由于管幕结构的变形机理尚不明确，管间连接参数需要进一步优化，阻碍了STS管幕工法的应用和推广.本文建立STS管幕结构的有限元模型，并结合室内试验验证有限元模型的合理性，系统性研究翼缘板厚度和螺栓直径对管幕结构横向抗弯刚度的影响规律，然后结合SPSS统计分析软件和归一化处理方法得出，螺栓直径和翼缘板厚度的比值在2.0~2.5时STS管幕结构的变形最合理.结合室内试验和有限元分析结果，建立了STS管幕结构横向抗弯刚度计算模型，并通过室内试验评估了该模型的正确性，计算误差均在20%以内.
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| 关 键 词： | 管幕结构 抗弯刚度 参数优化 最小二乘法 归一化 |
| 修稿时间： | 2020-12-23 |
Calculation Model of Flexural Stiffness of STS Structure and Parameters Optimization |
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| JIA Peng-jiao,SHI Pei-xin,GUAN Yong-ping,ZHAO Wen.Calculation Model of Flexural Stiffness of STS Structure and Parameters Optimization[J].Journal of Northeastern University(Natural Science),2021,42(8):1159-1165. |
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| Authors: | JIA Peng-jiao SHI Pei-xin GUAN Yong-ping ZHAO Wen |
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| Institution: | 1. School of Rail Transportation， Soochow University， Suzhou 215000， China; 2. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 3. School of Transportation Engineering， Shenyang Jianzhu University， Shenyang 110168， China. |
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| Abstract: | As a new buried excavation support system， the application and popularization of steel tube slab (STS) method are limited due to the unclear deformation mechanism of STS structure and lack of further optimization of the connection parameters between the tubes. So， a series of three-dimensional finite element models (FEMs) is established and verified by laboratory tests to investigate the influence of the flange thickness and diameter of bolts on flexural stiffness of STS structure. By means of SPSS software and normalization method， it is indicated that when the ratio of the diameter of bolts to the flange thickness ranges from 2.0 to 2.5， the deformation state of the STS structure is the most appropriate. Subsequently， a calculation model of flexural stiffness of STS structure is proposed according to experimental and numerical results. Reasonability of the presented model is evaluated， and the error is less than 20%. |
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| Keywords: | steel tube slab structure flexural stiffness parameter optimization least square method normalization |
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