Shaking table test study on seismic response characteristic of a cross node transfer station

Yu, Zhongyang; Zhang, Hongru; Zhang, Jingkun; Qiu, Yan-jia; Li, Weiyong

doi:10.1201/9781003363217-3

Cited by 1 publication

(3 citation statements)

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“…A series of 1‐g shaking table tests were conducted at the multi‐functional shaking table system in Tongji University 11 . The experimental setup, similarity ratio design, and model soil follow the method presented by Yu et al., 19,20 and a brief overview is provided to keep the integrity of the paper. Other information regarding the test design, including the design and fabrication of the model station with and without diaphragm walls, sensor arrangement, and test cases, will be introduced in detail in this section.…”

Section: Shaking Table Test Designmentioning

confidence: 99%

“…Note that the stiffness of the subway station could be determined by performing a simple frame analysis, for example, a unit concentrated force was applied to the corner of the model, and the stiffness was evaluated using the obtained reciprocal of the displacement. More detailed test design of the soil and structure model can be found in literature 19,20 …”

Section: Shaking Table Test Designmentioning

confidence: 99%

“…To satisfy the similitude relation in Table 1, the model structure is made of granular concrete, 20 which is a mixture of cement, sand, lime, and water, with a mass ratio of 1/5/0.8/1.16. Galvanized steel wires are utilized as longitudinal and transverse reinforcement for the model structure, and the compressive strength and elastic modulus of granular concrete and galvanized steel wires are summarized in Table 2.…”

Section: Shaking Table Test Designmentioning

confidence: 99%

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Shaking table test for subway station considering the influence of diaphragm walls

Yu,

Wang,

Zhang

et al. 2024

Earthq Engng Struct Dyn

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Underground diaphragm walls are commonly used as a support system for the construction of subway stations, working together with inner side walls of subway stations to withstand the pressure from surrounding soils. However, the effect of diaphragm walls on the seismic response of subway stations is still not well understood yet, or at least not well considered during design. In this paper, a series of 1 g shaking table tests is designed to investigate the seismic response of a typical two‐story and three‐span subway station considering the influence of underground diaphragm walls. The stratum is simulated by synthetic model soil (a mixture of sand and sawdust), and the model structure and diaphragm walls are made by granular concrete with galvanized steel wires. A test case of the structure without diaphragm walls is also involved and taken as a benchmark comparison to understand the impact of diaphragm walls on the seismic response of subway station. The seismic excitations for the test include actual seismic records with the amplitude of 0.2, 0.4, and 0.8 g, respectively. Based on the test data analysis, a comprehensive discussion is conducted on the influence of diaphragm walls on the seismic design of underground structures. Current misconceptions that ignoring the role of diaphragm walls is a conservative way in seismic design of underground structures are also reviewed. Results show that the presence of underground diaphragm walls would enhance the lateral stiffness of the structure, and thus significantly reduce the lateral deformation of subway stations during earthquakes. Notably, the structure with diaphragm walls also exhibits a significant amplification in acceleration response and experiences greater dynamic earth pressures on the sidewalls, and furthermore the strains at the connection between the sidewalls and diaphragm walls are dramatically amplified during the earthquake. It is worth noting that these adverse effects of the diaphragm walls on the amplification of dynamic earth pressures on the structure as well as the increase of internal forces at the sidewalls end‐diaphragm walls connection should be carefully considered in the seismic design of underground structures.

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Section: Shaking Table Test Designmentioning

confidence: 99%

Section: Shaking Table Test Designmentioning

confidence: 99%

Section: Shaking Table Test Designmentioning

confidence: 99%

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