Physical investigation on the behaviours of voussoir beams
| Autor: | Zhaoyuan Chu, Les Sudak, Derek B. Apel, Wei Victor Liu, Chaoshi Hu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Digital image correlation
Stress distribution Image correlation business.industry 0211 other engineering and technologies Abutment 02 engineering and technology Structural engineering 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences Displacement (vector) Stress (mechanics) lcsh:Engineering geology. Rock mechanics. Soil mechanics. Underground construction Strain distribution lcsh:TA703-712 Transverse shear deformation Voussoir business Geology Beam (structure) Voussoir beam 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Journal of Rock Mechanics and Geotechnical Engineering, Vol 12, Iss 3, Pp 516-527 (2020) |
| ISSN: | 1674-7755 |
| Popis: | It is important to understand the behaviour of voussoir beams in the design of underground excavations. There are a large number of discrepancies between the results obtained by different researchers so far. To resolve these discrepancies, physically testing the stress distribution at the midspan and abutment of voussoir beam is the key. In this paper, a simple two-block voussoir beam was built with loading system. The displacement and strain of the voussoir beam were measured by a digital image correlation system. The strain distribution along the joints of voussoir beams was firstly revealed. Then, the relationship between transverse load and midspan displacement of voussoir beam was presented. It is found that the stress distributions at the midspan and abutment are different both in shape and depth. The stress distribution is changing as the loading changes as well. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|