SRAP Pre-Stressed Reinforcing Techniques for Concrete Structures

2012 ◽  
Vol 157-158 ◽  
pp. 1545-1548
Author(s):  
Shao Wei Hu
Keyword(s):  
Numerical Simulation ◽  
Concrete Structures ◽  
Concrete Crack ◽  
Engineering Measures ◽  
Reinforcing Effects ◽  
Modified Resin

A large number of Concrete Structures need be reinforced in china. So as new rehabilitation and reinforcing techniques, the SRAP approaches were introduced in this paper, and the SR strengthens materials and AP modified resin mortars were combined with pre-stressed method in SRAP approaches. First, nowadays structure distress characteristics were presented and lots of reinforcing techniques were compared and analyzed in this paper. Based on the SRAP advantages such as the concrete crack rehabilitation and its used material innocuity and so on, the analysis results show that the SRAP are feasible and reasonable to guide the design and operation of structure rehabilitation and reinforcement, The SRAP construction measures and expected reinforcing effects were given out in this paper. The results shows that SRAP approaches with numerical simulation is feasible to guide structure rehabilitation and reinforcement，and the proposed SRAP engineering measures are effective for preventing structure local fracturing and satisfaction of rehabilitation and reinforcement targets.

Overview of Numerical Simulation Model of Mesoscopic Concrete Crack

2015 ◽  
Vol 744-746 ◽  
pp. 1443-1447
Author(s):  
Si Qi Li ◽  
Yin Bai
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Element Model ◽  
Crack Model ◽  
Discrete Fracture Model ◽  
Model Studies ◽  
Concrete Crack ◽  
Fracture Models ◽  
Smeared Crack ◽  
Smeared Crack Model

Through a number of literature analysis and research, this paper investigates the reviews and comparison under the meso model for numerical simulation of crack in a finite element model (FEM), including discrete fracture model, smeared crack model, fracture mechanics crack model,bond crack model. Studies show that: compared to other fracture models , smeared crack model by eliminating the need to change the unit type and re-division unit grid computing simple and widely used for treatment of concrete cracks in finite element method, the author cites a using smeared crack model example that are discussed in the paper.

Numerical Simulation of 3-D Fracture Behaviors on the FRP-Strengthened Concrete Structures

2006 ◽  
Vol 324-325 ◽  
pp. 423-426 ◽  
Author(s):  
Juan Xia Zhang ◽  
Chun An Tang ◽  
Xing Jie Hui ◽  
Wan Cheng Zhu ◽  
Zheng Zhao Liang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Failure Mode ◽  
Concrete Beam ◽  
Load Capacity ◽  
Failure Process ◽  
Concrete Structures ◽  
Interfacial Debonding ◽  
Numerical Code ◽  
External Loading ◽  
Frp Sheet

A numerical code RFPA3D (Realistic Failure Process Analysis) is used to simulate the crack initiation and propagation in FRP-strengthened concrete beam under external loading. In our model, the FRP-strengthened concrete is assumed to be a three-phase composite composed of concrete, FRP, and interface between them. The displacement-controlled loading scheme is used to simulate the complete failure process of FRP-strengthened concrete the numerical simulation of failure process of the specimens. It is found that the main failure mode is the interfacial debonding and the interfacial debonding may propagate either within the adhesive layer or through concrete layer in the vicinity of bond interface. The simulation results agree well with the experiment observations. The width of the FRP sheet is considered an important factor not only to significantly influence the debonding propagation type and crack distribution but also to control the ultimate load-capacity and ultimate strain. This study is focused on the failure process of the FRP-strengthened concrete beam and the effects of the width of FRP sheet on the failure mode and on the structural load-carrying capacity of concrete structures.

Sign in / Sign up

Export Citation Format

Share Document