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Earthquakes and Structures Volume 17, Number 6, December 2019 , pages 611-621 DOI: https://doi.org/10.12989/eas.2019.17.6.611 |
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Seismic performance of precast joint in assembled monolithic station: effect of assembled seam shape and position |
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Hongtao Liu and Xiuli Du
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| Abstract | ||
| Precast concrete structure has many advantages, but the assembled seam will affect potentially the overall seismic performance of structure. Based on the sidewall joint located in the bottom of assembled monolithic subway station, the main objectives of this study are, on one hand to present an experimental campaign on the seismic behavior of precast sidewall joint (PWJ) and cast-in-place sidewall joint (CWJ) subjected to low-cycle repeated loading, and on the other hand to explore the effect of shape and position of assembled seam on load carrying capacity and crack width of precast sidewall joint. Two fullscale specimens were designed and tested. The important index of failure pattern, loading carrying capacity, deformation performance and crack width were evaluated and compared. Based on the test results, a series of different height and variablyshape of assembled seam of precast sidewall joint were considered. The test and numerical investigations indicate that, (1) the carrying capacity and deformation capacity of precast sidewall and cast-in-place sidewall were very similar, but the crack failure pattern, bending deformation and shearing deformation in the plastic hinge zone were different obviously; (2) the influence of the assembled seam should be considered when precast underground structures located in the aquifer water-bearing stratum; (3) the optimal assembled seam shape and position can be suggested for the design of precast underground concrete structures according to the analysis results. | ||
| Key Words | ||
| precast sidewall joint; low-cycle repeated loading experiment; numerical analysis; assembled seam shape; assembled seam position; seismic performance | ||
| Address | ||
| Hongtao Liu: Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education, Beijing University of Technology, Beijing 100124, China; Faculty of Construction and Environment Department of Building and Real Estate, Hong Kong Polytechnic University, Hong Kong, 999077, China Xiuli Du: Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education, Beijing University of Technology, Beijing 100124, China | ||