Calculation Method for Shear Capacity of High-strength Lightweight Aggregate Concrete Frame Interior Joints Using Modified Compression Field Theory(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2018年05期
- Page:
- 24-31
- Research Field:
- Publishing date:
Info
- Title:
- Calculation Method for Shear Capacity of High-strength Lightweight Aggregate Concrete Frame Interior Joints Using Modified Compression Field Theory
- Author(s):
- WU-Tao; WANG Li-xun; LIU Xi
- School of Civil Engineering, Chang’an University
- Keywords:
- high-strength lightweight aggregate concrete; frame interior joint; modified compression field theory; shear strength
- PACS:
- -
- DOI:
- -
- Abstract:
- According to the seismic performance test results of the highstrength lightweight aggregate concrete (HSLAC) frame interior joints in 4 different stirrup ratios of core area under reversed quasi-static cyclic loading, the failure characteristics and shear behavior were mainly studied. Based on the experimental research and combined with the failure characteristics of HSLAC, through selecting suitable joint shear core area and modifing aggregate particle size calculation parameters, a calculation model for the shear capacity of HSLAC frame interior joints based on modified compression field theory (MCFT) was established. Then collected 13 lightweight aggregate concrete frame interior joint test results, the shear strengths of 17 specimens were calculated based on the model, the calculated results were compared with the test results. The results indicate that the failure characteristic of the member similar to that of normal concrete specimens, all HSLAC specimens experience cracking, yield, ultimate and failure during the failure process. The average value of the ratio between the test results and the calculated results of the proposed model is 0.907 and the variance is 0.008, the values are in good agreement, which verifies the accuracy and rationality of the proposed model. The model can be applied to the calculation of ultimate shear capacity of the kind of member, and the theory has definite mechanics theory and calculation process, can reflect the mechanical process of cracking, yield, ultimate and failure of the member more clearly.
Last Update: 2018-09-03