Torsional Behavior of Hybrid Truss Bridge according to Connection Systems

정광회,; 이상휴,; 이종원,; 최지훈,; 김장호,

doi:10.4334/jkci.2013.25.1.063

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…정광회 등(2013)은 기존 연구를 통해 복합트러스교에 대한 비틀림 모멘트 산정식을 계산하고 실험적 연구를 통해 격점구조별 비틀림 성능을 분석하였다. 13) Fig. 2의 복부파형강판 교량과 같이 종방향 단면이 일정하지 않은 복합 트러스교는 비틀림모멘트를 계산함에 있어, 일정한 간격으로 배치된 복부 트러스 부재를 연속된 복부로 환 산하고, 상 ․ 하 콘크리트 슬래브와 복부로 둘러싸인 폐단…”

Section: 서 론 1)unclassified

Analysis Evaluation of Torsional Behavior of Hybrid Truss Bridge according to Connection Systems

Choi¹,

Jung²,

Kim³

et al. 2014

Journal of the Korea Concrete Institute

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Hybrid Truss Bridge (HTB) uses steel truss webs instead of concrete webs in prestressed box girder bridges, which is becoming popular due to its structural benefits such as relatively light self-weight and good aesthetics appearance. Since the core technology of this bridge is the connection system between concrete slabs and steel truss members, several connection systems were proposed and experimentally evaluated. Also, the selected joint system was applied to the real bride design and construction. The research was performed on the connection system, since it can affect the global behavior of this bridge such as flexural and fatigue behaviors as well as the local behavior around the connection region. The evaluation study showed that HTB applied to a curved bridge or an eccentrically loaded bridge had a weak torsional capacity compared to an ordinary PSC box girder bridge due to the open cross-sectional characteristic of HTB. Therefore, three types of girders with different joint system between truss web member and concrete slab were tested for their torsional capacity. In this study, the three different types of HTB girders under torsional loading were simulated using FEM analysis to investigate the torsional behavior of HTB girders more in detail. The results are discussed in detail in the paper.

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Section: 서 론 1)unclassified

Analysis Evaluation of Torsional Behavior of Hybrid Truss Bridge according to Connection Systems

Choi¹,

Jung²,

Kim³

et al. 2014

Journal of the Korea Concrete Institute

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“…The steel-concrete connection joint is considered the most important part of hybrid truss bridges, transferring the load between the concrete chord and steel truss web [11,17,[20][21][22][23][24]. Therefore, some experimental and analytical studies on such joint structures have been reported.…”

Section: Introductionmentioning

confidence: 99%

“…However, the mechanical behavior was affected by the form of welding [29]. To reduce welding during construction, Jung et al [1,11,13,20,22] proposed a new connection joint composed of connection plates and a connection bolt. Furthermore, experimental and numerical investigations were carried out on this new connection system and HTB girders to clarify the structural capacity, fatigue capacity and torsional behavior.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior and Failure Mode of Steel–Concrete Connection Joints in a Hybrid Truss Bridge: Experimental Investigation

Tan

Zhu

et al. 2020

Materials

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The core part of a hybrid truss bridge is the connection joint which combines the concrete chord and steel truss-web members. To study the mechanical behavior and failure mode of steel–concrete connection joints in a hybrid truss bridge, static model tests were carried out on two connection joints with the scale of 1:3 under the horizontal load which was provided by a loading jack mounted on the vertical reaction wall. The specimen design, experimental setup and testing procedure were introduced. In the experiment, the displacement, strain level, concrete crack and experimental phenomena were factually recorded. Compared with the previous study results, the experimental results in this study demonstrated that the connection joints had the excellent bearing capacity and deformability. The minimum ultimate load and displacement of the two connection joints were 5200 kN and 59.01 mm, respectively. Moreover, the connection joints exhibited multiple failure modes, including the fracture of gusset plates, the slippage of high-strength bolts, the local buckling of compressive splice plates, the fracture of tensile splice plates and concrete cracking. Additionally, the strain distribution of the steel–concrete connection joints followed certain rules. It is expected that the findings from this paper may provide a reference for the design and construction of steel–concrete connection joints in hybrid truss bridges.

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“…2. (Jung et al 2013b) In EHT, the center of the concrete deck is in alignment with the centerline of the steel truss member such that the eccentric moment would be minimized as shown in Fig. 2(a).…”

Section: Load Transfer Mechanisms At the Connection Jointmentioning

confidence: 99%

Analytical and Experimental Studies on Torsional Behavior of Hybrid Truss Bridge Girders with Various Connection Joints

Choi

Jung

Kim

et al. 2014

ACT

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A hybrid truss bridge (HTB) is a bridge constructed by replacing the concrete webs of a pre-stressed box girder bridge with steel truss webs. With its open web section, HTB offers advantages of high structural efficiency and excellent aesthetic appearance. The core technology of HTB is the connection system between the steel trusses and the concrete deck. Since the open web section of a HTB decreases the torsional capacity, precise analysis of the torsional behavior of the open web section with respect to the connection joint type is needed to ensure the safety of HTBs. In this study, the torsional capacity of HTB was calculated using the torsion formula derived based on the steel plate thickness conversion equation for corrugated steel web plates and the space truss theory. The torsion formula was verified by performing a parametric study using a commercial finite element program. Next, the torsion analysis results of the HTB girder were compared to experimental results to evaluate their accuracy. Finally, the simulation, experimental, and torsion formula results were compared to evaluate the feasibility of using the formula in design.

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Torsional Behavior of Hybrid Truss Bridge according to Connection Systems

Cited by 3 publications

References 6 publications

Analysis Evaluation of Torsional Behavior of Hybrid Truss Bridge according to Connection Systems

Analysis Evaluation of Torsional Behavior of Hybrid Truss Bridge according to Connection Systems

Mechanical Behavior and Failure Mode of Steel–Concrete Connection Joints in a Hybrid Truss Bridge: Experimental Investigation

Analytical and Experimental Studies on Torsional Behavior of Hybrid Truss Bridge Girders with Various Connection Joints

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