A softened membrane model for composite box-girders with corrugated steel webs under pure torsion

Shen, Kongjian; Wan, Shui; Mo, Y. L.; Li, Xiayuan; Song, Aiming

doi:10.1016/j.engstruct.2018.07.021

Cited by 27 publications

(6 citation statements)

References 16 publications

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“…Due to the integrity of whole cross section, it is inaccurate that the torsional deformation coordination of CBGCSW is only in terms with that of TBSC in previous research (Ko et al, 2013;Mo et al, 2000;Shen et al, 2018aShen et al, , 2018bShen et al, , 2018d. In other words, the twist of CBGCSW is not only related to shear strain and geometry of TBSC, but also related to that of CSW (Nie and Tang, 2007).…”

Section: Torsional Deformation Coordination Of Whole Cross Sectionmentioning

confidence: 96%

“…To testify the superiority of MRA-STMT, torques and twists calculated by RA-STMT (Mo et al, 2000), USTMT (Shen et al, 2018d) and MRA-STMT are compared with experimental data obtained from this study and available literature (Ding et al, 2013a;Ko et al, 2013;Shen et al, 2018aShen et al, , 2018d, as illustrated in Tables 3 to 5 and Figure 14.…”

Section: Comparisons Of Mra-stmtwith Other Modelsmentioning

confidence: 99%

“…However, this theory no longer applies to torsional nonlinear analysis. Based on softened truss model for torsion (STMT), some researchers (Ding et al, 2013a(Ding et al, , 2013bKo et al, 2013;Mo et al, 2000;Shen et al, 2018aShen et al, , 2018d have carried out investigations on torsional nonlinear performance of CBGCSW. According to previous reference (Hsu, 1988;Hsu and Mo, 2010;Jeng and Hsu, 2009), STMT can be mainly divided into rotatingangle (RA) theory and fixed-angle (FA) theory.…”

Section: Introductionmentioning

confidence: 99%

“…Although the torque-twist curve from TS-STMT agrees with that of test and finite element analysis model, it is inaccurate that TS-STMT ignores the effect of t d on the average stressstrain relationships of concrete strut. Thereafter, with an eye to a two-stage shear strain relationship between TBSC and CSW and a shear strain relationship among CSW, Shen et al (2018aShen et al ( , 2018d first presented a theoretical model to predict the torsional performance of single-box multi-cell CBGCSW, called unified STMT (USTMT). Comparisons of USTMT with test on two specimens and finite element analysis models showed that the proposed model could compute entire performance of CBGCSW with multi-cell subjected to pure torsion.…”

Section: Introductionmentioning

confidence: 99%

“…Based on FA theory, Ding et al (2013b) first proposed a theoretical model to calculate the performance of CBGCSW under pure torsion, which was verified by test results in available literature, and Ding et al (2013a) also conducted a test on four scaled specimens to analyze the impact of influencing factors on ultimate torque of CBGCSW, such as thickness of CSW, concrete strength, and type of corrugation shape. Afterwards, considering biaxial constitutive laws of concrete and Poisson effect in post-cracking stage, Shen et al (2018aShen et al ( , 2018b extended softened membrane model (a type of FA theory) for concrete members to single-box multi-cell CBGCSW under torsion, and comparisons of the proposed model with test data showed that the proposed softened membrane model was capable of computing torsional performance of CBGCSW with multi-cell. Besides, Zhou et al (2019) proposed a two-stage shear strain relationship between TBSC and CSW for softened membrane model to calculate the torsional nonlinear performance.…”

Section: Introductionmentioning

confidence: 99%

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Modified rotating-angle softened truss model for composite box-girder with corrugated steel webs under pure torsion

Zhu

Wan

Shen

et al. 2020

Advances in Structural Engineering

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Replacement of traditional concrete webs with corrugated steel webs will lead to a significant decrease in torsional stiffness of composite box-girder with corrugated steel webs, which needs special attention in the design of wide and curved composite box-girder with corrugated steel webs. To improve the accuracy of prediction on the entire torsional performance of composite box-girder with corrugated steel webs, a modified rotating-angle softened truss model for torsion is developed in this study. Modified rotating-angle softened truss model for torsion mainly takes into account the new three-stage average stress coefficients, the new two-stage shear strain relationship between corrugated steel web and slabs, and the torsional deformation coordination of whole cross section. To testify the accuracy of modified rotating-angle softened truss model for torsion and to better understand the performance of composite box-girder with corrugated steel webs under pure torsion, two scaled specimens are tested in this article. The torque–twist curves and shear strains calculated by modified rotating-angle softened truss model for torsion reach a good agreement with experimental results, which indicates that modified rotating-angle softened truss model for torsion can successfully predict the entire torsional performance of composite box-girder with corrugated steel webs. In addition, compared with test data obtained from previous literature, the proposed modified rotating-angle softened truss model for torsion is more capable of predicting full torsional response of composite box-girder with corrugated steel webs than other rotating-angle models, especially at cracking stage and ultimate stage.

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