Eccentric-Axial-Load Test for Composite Columns Using Bolt-Connected Steel Angles

Kim, Hyeon-Jin; Hwang, Hyeon‐Jong; Park, Hong-Gun

doi:10.1061/(asce)st.1943-541x.0002699

Cited by 15 publications

(3 citation statements)

References 16 publications

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“…e construction methods used are cantilever pouring and cantilever assembly method, jacking method, mobile formwork method, and large floating crane, erection, and rotation construction method [14].…”

Section: Literature Reviewmentioning

confidence: 99%

“…In highway and railway bridge projects, most of the simply supported beams above 20 m are made of prestressed concrete, and among the prestressed concrete bridges above medium span, cable-stayed bridges, T-shaped rigid-frame bridges, continuous girder bridges, truss arches, and truss girder (T-frame) bridges have been built [ 13 ]. The construction methods used are cantilever pouring and cantilever assembly method, jacking method, mobile formwork method, and large floating crane, erection, and rotation construction method [ 14 ].…”

Section: Literature Reviewmentioning

confidence: 99%

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Load Test Analysis of a Long-Span Prestressed Nano-Concrete Highway Bridge

Yan

2022

International Journal of Analytical Chemistry

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In order to solve the problem of vehicle-bridge coupling vibration of a continuous semisteel bridge, the main bridge type of long-span prestressed concrete girder bridge, the author proposes a bridge safety test system based on the dynamic and static load test. The system combines the change of stress and deflection with the vibration amplitude of the bridge body, and using the modeling assistant in large-scale finite element software MIDAS/CIVIL, a three-dimensional finite element real bridge model is established, including input of section data, the input of boundary conditions, and the input of loads. The result obtained is as follows: the structural verification coefficient of the control strain of the main girder under each working condition is not greater than 1.0, indicating that the flexural rigidity of the structure meets the design requirements. In addition, under each working condition, the ratio of the residual strain after unloading to the measured total strain is less than 20%. Under each working condition, the deflection calibration coefficient of each control section is less than 1.0, and the ratio of residual deflection to total deflection of each measuring point is at most 3.9%; each residual deflection is small. The damping ratios are all less than 5% of the empirical damping ratio of concrete members, indicating that the bridge structure is in good condition. The result obtained by the author is compared with the standard allowable value and the theoretical calculation value, so as to provide a basis for the study of the bearing capacity of similar bridges and to verify the standardization and rationality of the existing bridge structural design.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

Load Test Analysis of a Long-Span Prestressed Nano-Concrete Highway Bridge

Yan

2022

International Journal of Analytical Chemistry

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“…A series of studies have investigated the compressive, [4][5][6] flexural, [7][8][9] and seismic [10][11][12] properties and the confining mechanism [13] of SARC members, but studies on torsional behavior of SARC are still relatively limited. On the other hand, complex and irregular structures continue emerging due to the special needs of architectural functions and appearances, resulting in the significant torsional moments on structural elements, especially bridges curved in space, corner columns in frame, and spandrel beams in buildings, [14,15] which explains why the torsional performance of the structure cannot be ignored.…”

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Investigation on mechanical behavior of steel angle frame reinforced concrete beams under torsion

Chen

Song

Zhou

et al. 2022

Structural Design Tall Build

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Steel angle frame reinforced concrete (SARC) beam is a kind of composite beam with encased steel angle frame. The torsion tests were carried out on six SARC beams and one reinforced concrete (RC) beam to investigate their torsional behavior. Test variables include space between steel plates, angle of steel plates, concrete cover depth, and concrete strength. The results showed that the reduction of space between steel plates causes specimens to crack in advance, but improves torsional behavior after cracking markedly. The energy dissipation coefficient reduces as concrete cover depth increases. Damage index can be effectively reduced by increasing concrete strength, reducing plates spacing, and increasing concrete cover depth. The overall torsional behavior of SARC beam can be improved by reducing the spacing between the plates, adopting staggered vertical and oblique steel plates, and increasing concrete strength, but the effect is adverse when concrete cover depth increases. Moreover, the space between steel plates should be greater than 100 mm, and concrete cover depth should be less than 35 mm for maximizing the torsional strength of steel angle frame. Considering the positive roles of steel angle frame and oblique steel plates, the calculation methods of cracking and ultimate torsional moment were proposed. This study can provide a theoretical basis for the engineering application of SARC beams subjected to torsion.

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