Laboratory Tests for Subgrade Reaction Coefficient in Seismic Design of Underground Engineering Domain
Subgrade reaction coefficient is commonly considered as the primary challenge in simplified seismic design of underground structures. Carrying out test is the most reliable way to acquire this intrinsic soil property. Owing to the limitations of experimental cost, time consumption, soil deformation...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/6958642 |
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| author | Kunpeng Xu Liping Jing Xinjun Cheng Haian Liang Jia Bin |
| author_facet | Kunpeng Xu Liping Jing Xinjun Cheng Haian Liang Jia Bin |
| author_sort | Kunpeng Xu |
| collection | DOAJ |
| description | Subgrade reaction coefficient is commonly considered as the primary challenge in simplified seismic design of underground structures. Carrying out test is the most reliable way to acquire this intrinsic soil property. Owing to the limitations of experimental cost, time consumption, soil deformation mode, size effect, and confined condition, the existing testing methods cannot satisfy the requirements of high-precision subgrade reaction coefficient in seismic design process of underground structures. Accordingly, the present study makes an attempt to provide new laboratory testing methods considering realistic seismic response of soil, based on shaking table test and quasistatic test. Conventional shaking table test for sandy free-field was performed, with the results indicating that the equivalent normal subgrade reaction coefficients derived from the experimental hysteretic curves are reasonable and verifying the deformation mode under seismic excitation. A novel multifunctional quasistatic pushover device was invented, which can simulate the most unfavorable deformation mode of soil during the earthquake. In addition, the first successful application of an innovative quasistatic testing method in evaluating subgrade reaction coefficient was reported. The findings of this study provide preliminary detailed insights into subgrade reaction coefficient evaluation which can benefit seismic design of underground structures. |
| format | Article |
| id | doaj-art-1b3dd50bac39433db134e326db7f7374 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-1b3dd50bac39433db134e326db7f73742025-02-03T01:28:33ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/69586426958642Laboratory Tests for Subgrade Reaction Coefficient in Seismic Design of Underground Engineering DomainKunpeng Xu0Liping Jing1Xinjun Cheng2Haian Liang3Jia Bin4Key Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, Heilongjiang Province, ChinaKey Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, Heilongjiang Province, ChinaState Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi Province, ChinaState Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi Province, ChinaCollege of Civil Engineering, Hunan University of Technology, Zhuzhou 412000, Hunan Province, ChinaSubgrade reaction coefficient is commonly considered as the primary challenge in simplified seismic design of underground structures. Carrying out test is the most reliable way to acquire this intrinsic soil property. Owing to the limitations of experimental cost, time consumption, soil deformation mode, size effect, and confined condition, the existing testing methods cannot satisfy the requirements of high-precision subgrade reaction coefficient in seismic design process of underground structures. Accordingly, the present study makes an attempt to provide new laboratory testing methods considering realistic seismic response of soil, based on shaking table test and quasistatic test. Conventional shaking table test for sandy free-field was performed, with the results indicating that the equivalent normal subgrade reaction coefficients derived from the experimental hysteretic curves are reasonable and verifying the deformation mode under seismic excitation. A novel multifunctional quasistatic pushover device was invented, which can simulate the most unfavorable deformation mode of soil during the earthquake. In addition, the first successful application of an innovative quasistatic testing method in evaluating subgrade reaction coefficient was reported. The findings of this study provide preliminary detailed insights into subgrade reaction coefficient evaluation which can benefit seismic design of underground structures.http://dx.doi.org/10.1155/2020/6958642 |
| spellingShingle | Kunpeng Xu Liping Jing Xinjun Cheng Haian Liang Jia Bin Laboratory Tests for Subgrade Reaction Coefficient in Seismic Design of Underground Engineering Domain Advances in Civil Engineering |
| title | Laboratory Tests for Subgrade Reaction Coefficient in Seismic Design of Underground Engineering Domain |
| title_full | Laboratory Tests for Subgrade Reaction Coefficient in Seismic Design of Underground Engineering Domain |
| title_fullStr | Laboratory Tests for Subgrade Reaction Coefficient in Seismic Design of Underground Engineering Domain |
| title_full_unstemmed | Laboratory Tests for Subgrade Reaction Coefficient in Seismic Design of Underground Engineering Domain |
| title_short | Laboratory Tests for Subgrade Reaction Coefficient in Seismic Design of Underground Engineering Domain |
| title_sort | laboratory tests for subgrade reaction coefficient in seismic design of underground engineering domain |
| url | http://dx.doi.org/10.1155/2020/6958642 |
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