Experiment on Anchorage Performance of Planting Rebar with Rapid-solidification Inorganic Adhesive(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2019年01期
- Page:
- 13-21
- Research Field:
- Publishing date:
Info
- Title:
- Experiment on Anchorage Performance of Planting Rebar with Rapid-solidification Inorganic Adhesive
- Author(s):
- SHANG Shou-ping; HUANG Xin-zhong; YANG Tian
- College of Civil Engineering, Hunan University
- Keywords:
- reinforcement of structural engineering; inorganic adhesive of planting rebar; pull-out test; anchorage performance; uniform shear model; design method of rebar planting
- PACS:
- -
- DOI:
- -
- Abstract:
- Based on the problems of low modulus of elasticity, easy aging and poor heat resistance of organic adhesives, a new type of inorganic adhesives with high strength and rapid solidification was developed. Through the pullout test of the planting rebar in the horizontal and vertical planes of concrete substrates with inorganic adhesive, and comparing the test results under different working conditions, the effects of rebar diameter, concrete strength, anchoring depth and the implanted angle on the anchorage performance of rebar planting were investigated. Several typical failure patterns were concluded based on the test phenomena, and according to the test data, the loaddisplacement curves of two kinds of typical failure modes were drawn, the anchorage stress mechanism of planting rebar was analyzed. From the view of structural safety and engineering economy, an approximate formula for calculating anchorage depth was obtained through theoretical deduction, and a simple and practical design method for planting rebar was proposed. The method was applied to the test, and the theoretical calculation values and the test values were compared. The results show that on the basis of uniform shear model, the average bond strength of steel specimen after 28 d can reach 19.65 MPa or even higher, far more than the bond strength of A grade adhesive (11 MPa) which was proposed in Technical Regulation of Chemicallyplanted Steel Bars in Concrete Structures. The proposed design method of planting rebar is applicable to various working conditions, and the theoretical calculation results of anchoring depth are in good agreement with the experimental values. The design method of planting rebar can be applied to the future design of planting rebar.
Last Update: 2019-01-23