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Shear strength and deformation modeling of conventionally reinforced short coupling beams
- Source :
- Engineering Structures. 239:112282
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- In this paper, a mechanics based analytical truss model is proposed to predict the shear strength and deformation of conventionally reinforced coupling beams with span-to-height ratios less than 1.75 (referred to as short coupling beams). The model considers the yield of only parts of stirrups, and its load path is composed of a direct main strut connecting the compression zones at both ends of the beam and secondary struts balancing with stirrups. By satisfying the compatibility condition at the intersection node of the struts, the assignment of the applied shear load in the main and secondary struts, as well as the shear load-transverse displacement relationship of the beam, are determined. The shear strength predictions by the truss model are compared with test results of 37 conventional reinforced short coupling beams, which shows that it can accurately predict the shear strength with a coefficient of variation (COV) of 0.052, while the predictions provided by ACI 318-19 and GB 50010-2010 are relatively inaccurate (the COVs are 0.19 and 0.21, respectively). In addition, the skeleton curves of 27 short coupling beams are calculated by the truss model, and the results show that the predictions are in good agreement with the test results. In order to simplify the calculation, a simplified model is proposed based on the refined truss model. Although the accuracy of the simplified model is slightly reduced (the COV is 0.071), it is still significantly higher than those of the design codes. Based on the simplified model, a standardized design method, which indirectly considers the beam deformation capacity, is provided for practical shear design.
- Subjects :
- Yield (engineering)
Materials science
business.industry
0211 other engineering and technologies
Truss
020101 civil engineering
02 engineering and technology
Structural engineering
Compression (physics)
Displacement (vector)
0201 civil engineering
Shear (sheet metal)
021105 building & construction
Shear strength
Deformation (engineering)
business
Beam (structure)
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 01410296
- Volume :
- 239
- Database :
- OpenAIRE
- Journal :
- Engineering Structures
- Accession number :
- edsair.doi...........81ddf21b482981345c2af02c835ee215