Calculation Model of Flexural Stiffness of STS Structure and Parameters Optimization

doi:10.12068/j.issn.1005-3026.2021.08.014

Journal of Northeastern University(Natural Science) ›› 2021, Vol. 42 ›› Issue (8): 1159-1165.DOI: 10.12068/j.issn.1005-3026.2021.08.014

• Resources & Civil Engineering • Previous Articles Next Articles

Calculation Model of Flexural Stiffness of STS Structure and Parameters Optimization

JIA Peng-jiao^1,2， SHI Pei-xin¹， GUAN Yong-ping³， ZHAO Wen²

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.

Revised:2020-12-23 Accepted:2020-12-23 Published:2021-09-02
Contact: GUAN Yong-ping
About author:-
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Abstract

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%.

Key words: steel tube slab structure; flexural stiffness; parameter optimization; least square method; normalization

CLC Number:

TU93

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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Calculation Model of Flexural Stiffness of STS Structure and Parameters Optimization

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