scholarly journals STUDY ON DYNAMIC SHEAR RESISTANCE OF RC BEAMS BASED ON DYNAMIC MODIFIED COMPRESSION FIELD THEORY

2016 ◽  
Vol 72 (2) ◽  
pp. 181-195
Author(s):  
Amornthep SOMRAJ ◽  
Kazunori FUJIKAKE ◽  
Bing LI
Keyword(s):  
Field Theory ◽  
Shear Resistance ◽  
Rc Beams ◽  
Dynamic Shear ◽  
Modified Compression Field Theory ◽  
Compression Field

Dynamic Shear Resistance of RC Beams Based on Modified Compression Field Theory

2016 ◽  
Vol 711 ◽  
pp. 799-805
Author(s):  
Kazunori Fujikake ◽  
Amornthep Somraj
Keyword(s):  
Field Theory ◽  
Analytical Model ◽  
Shear Capacity ◽  
Experimental Results ◽  
Rc Beams ◽  
Dynamic Shear ◽  
Loading Tests ◽  
Blast Loadings ◽  
Modified Compression Field Theory ◽  
Compression Field

The aim of this study was to develop an analytical model to estimate the dynamic shear capacity of RC beams which may exhibit diagonal tension failure under impact and blast loadings. Thus, the modified compression field theory has been extended to dynamic loading in this study. The developed analytical model has been applied to the experimental results obtained from rapid loading tests of RC beams. As a result, the developed analytical model has been in good agreement with the experimental results.

scholarly journals Analysis of the Shear Capacity of Ultrahigh Performance Concrete Beams Based on the Modified Compression Field Theory

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Wei Feng ◽  
Hongming Feng ◽  
Zhijun Zhou ◽  
Xiongwei Shi
Keyword(s):  
Field Theory ◽  
Failure Modes ◽  
Shear Capacity ◽  
Analysis Model ◽  
Shear Span ◽  
Compression Failure ◽  
Shear Bearing Capacity ◽  
Modified Compression Field Theory ◽  
Compression Field ◽  
Simplified Formula

An analysis model of the shear capacity of prestressed ultrahigh performance concrete (UHPC) beams under the combined action of bending and shearing was established in this paper based on the modified compression field theory and by considering the unique material constitutive relation of UHPC. Shear tests were performed using three prestressed UHPC-T beams with different shear-span ratios to verify the correctness of the model. The results showed that the shear-span ratio greatly influenced the shear capacity and failure modes of UHPC-T beams. Upon increasing the shear-span ratio, the failure modes of the three beams were inclined compression failure, shear compression failure, and diagonal tension failure, successively. When the shear-span ratio changed from 1.04 to 2.12, the shear bearing capacity decreased greatly; however, when the shear-span ratio changed from 2.12 to 3.19, the decrease of the shear bearing capacity was very small. In addition, the MCFT analysis model was used to analyze the experimental data, and the predicted results were in good agreement, which proved the applicability of the model. Finally, according to the existing shear test results of UHPC beams and based on the main influencing factors, a simplified formula for predicting the shear capacity of UHPC beams was obtained by fitting. Comparing the MCFT model with the results of other pieces of literature, this formula accurately predicted the shear capacity of UHPC beams. The MCFT model and the simplified formula presented in this paper provide a powerful tool for predicting the shear performance of UHPC-T beams, which will contribute to the design and analysis of UHPC-T beams.

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