The objective of this paper was to explore the bond-slip relationship between carbon fiber-reinforced polymer (CFRP) sheets and concrete under cyclic loading through experimental and analytical approaches. Modified beam tests were performed in order to gain insight into the bond-slip relationship under static and cyclic loading. The test variables are the CFRP-to-concrete width ratio, and the b...

To solve the problem that repair material of bridge's expansion joint anchorage area is prone to debonding from other bridge components, polyurethane concrete was designed and prepared, bonding performance tested by bond splitting test, direct shear oblique steel reinforcement pull-out test. The results show interfacial strength cement can be improved increasing roughness. increases up 91.4%, 5...

Abstract The paper reports the analytical investigation in Multi-storey building located seismic zone III. This is considered as moderate-damage risk per Indian Codal provision and thirty percent of India falls this category. To improve performance, externally bonded FRP strengthening techniques are adopted to deficient beam columns, paper, analysis carried out with without lateral resisting sy...

Abstract Low mechanical resistance and high weight restrict use of natural stones in applications where tensile or flexural capacity is required together with a low weight, such as for long spans or thin sections (e.g., cladding, countertops, desktops). The use of composite laminates as external reinforcement both to increase the mechanical resistance and to decrease weight of natural stone is ...

The current guidelines, namely ACI 440.2R and fib TG-9.3, quantify the nominal shear strength of strengthened reinforced concrete (RC) beams by simply summing up contribution three components: (Vc), steel stirrups (Vs), externally bonded fiber polymer (EB-FRP) (Vf). However, as reported in literature, this assumption is inaccurate due to an adverse interaction between EB-FRP stirrups. This rese...

Abstract The FRP material plays a major role as strengthening in RC structural elements. It is popularly used to improve the load carrying capacity and stiffness elements by wrapping with sheets (combination of GFRP & CFRP). usefulness laminates external at both sides full vertical strips interval 100mm on beams studied.. In this experimental study nine reinforced concrete were cast that th...

OBJECTIVES The aim of this study is to investigate the effect of macroscopic grooves on bone formation in vivo and differentiation of human mesenchymal stem cells (hMSCs) in vitro. MATERIALS AND METHODS The effects of macroscopic grooves on titanium alloy implants and disks were tested in rabbit tibiae and cultured hMSCs. The bone-to-implant contact (BIC) and bone area were evaluated in rabbi...