Out-of-plane creep buckling analysis on slender concrete-filled steel tubular arches

Geng, Yun; Ranzi, Gianluca; Wang, Yutao; Wang, Yuyin

doi:10.1016/j.jcsr.2017.10.010

Cited by 22 publications

(8 citation statements)

References 24 publications

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“…In the finite element model calculation, the following assumptions are made: (1) e structure of the tower body is a homogeneous elastomer, and the material properties of the structure are expressed according to an elastic modulus of 3.45 × 104 MPa and a Poisson's ratio of 0.1667 [20,21]. (2) e main load is the tensile force of the cable and the 8…”

Section: Finite Element Model Calculation Assumptionmentioning

confidence: 99%

Mechanical Characteristics of the Main Tower of a Polygonal Line Tower Cable‐Stayed Bridge

Bao

2020

Advances in Civil Engineering

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The main tower of a polygonal line tower cable-stayed bridge bears most of the axial force transmitted by the stay cable and also bears the moment under certain unbalanced load. For a polygonal line tower cable-stayed bridge, the main tower has a bending corner and the direction of huge axial force transmission changes at this bending corner where the axis of the main tower changes. This study examined a cable-stayed bridge with a single cable plane in Shenyang and used model test and finite element numerical comparative analysis to analyze the mechanical properties of the key parts, including the main tower bending corner of the concrete polygonal line tower. The results show a serious stress concentration phenomenon at the bending corner of the main tower but a small range of high stress area. After the stiffening plate is set at the corner, the stress concentration coefficient of the bending corner section decreases and the stiffening plate eliminates the out-of-plane bending phenomenon of the tower wall at the middle span side as vertical tensile stress occurs in the stiffener at the bending corner. Based on these results, the design should be improved to increase the angle of the stiffening plate corner and appropriately strengthen the configuration of the vertical main tensile steel bar and the surface anticracking steel mesh inside the stiffening plate.

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Section: Finite Element Model Calculation Assumptionmentioning

confidence: 99%

Mechanical Characteristics of the Main Tower of a Polygonal Line Tower Cable‐Stayed Bridge

Bao

2020

Advances in Civil Engineering

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“…The long-span deck-type concrete-filled steel tube (CFST) arch bridge has good terrain adaptability, while being economical and providing high levels of structural stiffness [1][2][3][4][5][6]. It is suitable for building in the mountainous area of southwest China.…”

Section: Introductionmentioning

confidence: 99%

Improvement in the Seismic Performance of a Super-Long-Span Concrete-Filled Steel-Tube-Arch Bridge

Tong

Gan

et al. 2023

Buildings

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The applicability of current seismic-performance-improvement technologies needs to be studied. This research took a super-long-span CFST arch bridge with a total length of 788 m as the object on which to perform a non-linear time-history analysis and a seismic-check calculation according to the seismic response, so as to reveal the seismic weak points of the arch bridge. After the completion of the bridge’s construction, we arranged and utilized the stayed buckle cables (SBCs) reasonably. The seismic performance of the super-long-span CFST arch bridge was improved through friction-pendulum bearings (FPBs) and SBCs. The research shows that FPBs can solve the problem of the insufficient shear resistance of bearings, and SBCs can address the problem whereby the compressive stress of the transverse connection of the main arch exceeds the allowable stress. Moreover, SBCs can increase the transverse stiffness of arch bridges and reduce their seismic responses. Finally, a combination of FPBs and SBCs was adopted to improve the overall seismic performance of the arch bridge and obtain the best seismic-performance-improvement effect.

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“…Furthermore, Zhong et al [19] provided theoretical solutions and experimental studies on a rectangular cross-section arch. In addition to the aforementioned studies, there have been numerous investigations on the out-plane buckling of arches considering various factors such as shearing effects [20], temperature fields [21], creep [22,23], and functionally graded materials [24,25]. However, due to the scope of this paper, not all of these studies will be introduced.…”

Section: Introductionmentioning

confidence: 99%

Out-plane Buckling of Arches with Variable Cross-section

Jiang,

Deng,

Dai

et al. 2023

Preprint

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Variable cross-section arch is widely used in practical engineering because of its beautiful arc and excellent mechanical properties. However, there is still no systematic and comprehensive study on the out-plane buckling of variable cross-section arch. In view of this, this paper is concentrated on an elastic analytical research of out-plane buckling of arches with variable cross-section under a uniformly distributed radial local load. The pre-buckling and out-plane buckling behaviour of a variable cross-sectional arch under an external load is quite different from that of an arch with uniform cross-section. The Castigliano's second theorem is used to establish pre-buckling force method equilibrium equations for variable cross-sectional arches under a uniformly distributed radial local load, and corresponding analytical solutions of normal stress, axial compression and the bending moment are obtained. Based on the energy method and the Ritz method, analytical solutions of the critical load for the elastic out-plane buckling of arches with variable cross-section are derived. Comparisons with ANSYS results indicated that the analytical solutions are able to accurately predict the pre-buckling internal forces and critical out-plane buckling load of variable cross-section arches subjected to a uniformly distributed radial local load. It is found that the internal forces and the out-plane buckling load of an arch are significantly affected by the variation of cross-sectional height. With the ratio of cross-sectional height of the top to the end increase, the bending moment decreases and the axial force and critical out-plane buckling load increase. Analytical solutions of pre-buckling internal force and critical out-plane buckling load problems for arches with variable cross-section have a wider significance, since they can provide an effective explicit analytic method for the optimal design of arch structure.

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Out-of-plane creep buckling analysis on slender concrete-filled steel tubular arches

Cited by 22 publications

References 24 publications

Mechanical Characteristics of the Main Tower of a Polygonal Line Tower Cable‐Stayed Bridge

Mechanical Characteristics of the Main Tower of a Polygonal Line Tower Cable‐Stayed Bridge

Improvement in the Seismic Performance of a Super-Long-Span Concrete-Filled Steel-Tube-Arch Bridge

Out-plane Buckling of Arches with Variable Cross-section

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