Seismic Fragility of Steel Piping System Based on Pipe Size, Coupling Type, and Wall Thickness

Ju, Bu Seog; Gupta, Abhinav; Ryu, Yonghee

doi:10.1007/s13296-018-0100-4

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…e results showed that the PPR pipe had stronger deformation capability than the galvanized steel pipe but its bending moment was much smaller. Ju et al [14] studied the effects of the diameter of the pipe, thickness of the wall, and different types of coupling on the seismic vulnerability of household pipes. e results showed that the type of coupling used significantly affected their seismic performance, where threaded coupling was more vulnerable than grooved coupling.…”

Section: Introductionmentioning

confidence: 99%

Shaking Table Test of a Full‐Scale RC Frame Structure with an Indoor Gas Piping System

Sun

Guo

et al. 2022

Advances in Civil Engineering

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To investigate the seismic behavior of a two-story RC frame structure with an indoor gas piping system, a shaking table test was performed and the data obtained from the shaking table test were analyzed in this paper. The detailing of the structural elements was compliant with the Chinese seismic design code, whereas minor modifications were applied to the pipe materials and joint arrangements. In the test, three kinds of pipe materials (galvanized steel, thin-walled stainless steel, and polyethylene) combined with three types of joint arrangements were selected. The filling materials of the joint were epoxy resin, batched jute, and asbestos cement. A series of full-scale shake table tests were performed by gradually increasing the three ground motions for reaching to the near collapse limit state. The dynamic characteristics and the responses of the model were investigated via analyzing shaking table test data and the observed damage. The test results also indicated that different joint arrangements had a different impact on the dynamic response of the pipes when subjected to strong ground motions. The peak acceleration of metal pipes with a rigid joint was higher than that of flexible ones, and the peak acceleration of plastic pipes with flexible joint connection was higher than that of rigid ones.

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Section: Introductionmentioning

confidence: 99%

Shaking Table Test of a Full‐Scale RC Frame Structure with an Indoor Gas Piping System

Sun

Guo

et al. 2022

Advances in Civil Engineering

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“…Seismic vulnerability analysis can offer reasonably accurate failure probabilities for GILs under varying PGAs, thereby establishing a foundation for the seismic design and performance assessment of GILs [26,27]. The Section 3 demonstrate that only retrofit method III can effectively diminish the critical seismic response of the GIL.…”

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confidence: 97%

Seismic Performance Evaluation and Retrofit Strategy of Overhead Gas-Insulated Transmission Lines

Li,

Xie,

Wen

2023

Buildings

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The overhead gas-insulated transmission line (GIL) in ultra-high-voltage converter stations, distinct from traditional buried pipelines, demands a thorough investigation into its seismic behavior due to limitations in existing codes. A refined finite element model is established, considering internal structure, slip between various parts, and the relative displacement at the internal conductor joint. Seismic analysis reveals the vulnerability of the GIL at the corner of the pipeline height change, with two failure modes: housing strength failure and internal conductor displacement exceeding the limit. Furthermore, the acceleration amplification coefficient of the support generally exceeds 2.0. Two retrofit methods, namely increasing the fundamental frequency of all supports and fixing the connections between all supports and the housing, have been proposed. The results indicate the effectiveness of both methods in reducing the relative displacement. Fixing all the supports effectively reduces the stress, whereas the other one yields the opposite effect. The seismic performance of a GIL is determined not by the dynamic amplification of supports, but by the control of relative displacement between critical sections, specifically influenced by the angular deformation of the pipeline’s first-order translational vibration mode along the line direction. Seismic vulnerability analysis reveals a reduction of over 50% in the failure probability of the GIL after the retrofit compared to before the retrofit, with the PGA exceeding 0.4 g.

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Seismic behavior of riser pipes with pressure and groove joints using an in-plane cyclic loading test

Kim

Jeon

Ahn

et al. 2021

Journal of Building Engineering

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Seismic Fragility of Steel Piping System Based on Pipe Size, Coupling Type, and Wall Thickness

Cited by 4 publications

References 13 publications

Shaking Table Test of a Full‐Scale RC Frame Structure with an Indoor Gas Piping System

Shaking Table Test of a Full‐Scale RC Frame Structure with an Indoor Gas Piping System

Seismic Performance Evaluation and Retrofit Strategy of Overhead Gas-Insulated Transmission Lines

Seismic behavior of riser pipes with pressure and groove joints using an in-plane cyclic loading test

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