...Jianxin Zhang; Chenyun Shang; Yueyang Zhai; Pang Chen; Tingwei Zhang The aim of this work was to develop an accurate model to swiftly forecast the ultimate conditions and the stress–strain curves of ultra-high-performance concrete (UHPC) confined by fibre-reinforced polymer (FRP). Four neural...

... in compressive strength, elastic modulus and peak strain of RACB were analysed as a function of the proportion of substituted recycled fine aggregate, and a stress–strain equation was established. A damage model was established using ultrasonic non-destructive testing technology to reveal the damage mechanism...

... experiment to study the mechanical properties of the material. The experimental results indicated that the specimens exhibited longitudinal splitting failure patterns under uniaxial compression and inclined plane shear failure patterns under triaxial compression. The stress–strain curves were divided...

...Sangmin Shin; Yunsun Choi; Chadon Lee In total, 48 cylinders were tested to measure the uniaxial compressive stress–strain relationships of geopolymer concrete composite (GPCC) with fly ash blended with ground granulated blast-furnace slag (GGBFS). Four replica specimens were fabricated for each...

...Hua Li; Jiaping Liu; Yujiang Wang; Qian Tian The restrained volume expansion of expansive agents during hydration is often used to offset strains caused by the shrinkage of cement-based materials (CBMs). The hydration and expansion process of a laboratory-prepared calcium-oxide (CaO)-type expansive...

...Peng Liu; Ying Chen; Zhiwu Yu The influences of temperature, relative humidity (RH) and carbon dioxide (CO₂) concentration on concrete carbonation in a simulated environment were investigated. The carbonation depth, compressive strength and surface strain of concrete under different...

...–transverse extension curve and strain redistribution, is presented and the quantitative effects of the concentration ratio and the mats’ rotation angle on the efficiency coefficient and the dispersion angle of compressive stresses of bottle-shaped struts are given. The related provisions of ACI 318-14 and BS...

... with a rubber content of 110 kg/m³. The restrained squared eccentric ring test method was applied to measure the restrained shrinkage strains at early age (first 5 d) in the 0, 90 and 180° zone of the specimens, as well as the time when the specimens cracked. All 12 specimens cracked near the 0° zone...

... regions of RC columns if the axial force ratio is low. This study investigated the elongation behaviour of RC columns by testing five groups of 20 specimens subjected to three different loading patterns. Experimental results showed that the longitudinal axial strain of RC columns was quite different from...

... 189 203 BL 1·0 126 151 172 184 187 206 214 ^a Negative sign indicates the weight gain Analysis of an RC member can be undertaken if we can understand the stress–strain behaviour of the constituent materials – that is, steel and concrete. As steel is a factory...

...Haytham F. Isleem; Daiyu Wang; Zhenyu Wang Good modelling of the axial compressive stress–strain behaviour of confined reinforced-concrete (RC) columns is necessary for the structural analysis and design to assess their strength and ductility capacities. Thus, this paper presents closed-form...

...Xudong Chen; Lingyu Xu; Dandan Shi; Yuzhi Chen; Wei Zhou; Qiao Wang Owing to difficulties relating to the direct tension test on concrete, few test data are available. To study the effect of strain rate and unloading stress on the mechanical properties of concrete, three strain rates of 10...

... and required a lower proportion of cement to attain the same strength. Compared with the specimens made with natural aggregates, specimens made with EAF oxidising slag aggregates had larger areas under the ascending curves because of their higher elastic moduli and superior compressive strain, arising from...

... for both the ascending as well as the descending branches of the stress–strain relationship. The measured stress–strain relationships of companion cylindrical specimens were averaged using a simple procedure that was found to be effective. The proposed constitutive model reflected the experimental trend...

... in the concrete slab around the water surface. 26 08 2016 13 03 2017 27 03 2017 ICE Publishing: All rights reserved 2017 cracks & cracking strain testing, structural elements Cracks in the facing concrete of rockfill dams often occur, especially appearing around...

... that industrial-grade CNTs can lead to increases in cubic compressive strength, tensile splitting strength, prismatic compressive strength and ultimate strain of concrete (up to 34·2, 11·1, 19·4 and 8·3%, respectively) comparable to those obtained with the use of fine nanotube particles; no significant influence...

... of the spirals, but greatly decreased as the concrete compressive strength increased. Using the relationship between axial and lateral strains at peak stress of spirally confined concrete, an analytical model was developed to predict the stress–strain relationship of confined concrete. The proposed model can...

...Chang Wu; Zuanfeng Pan; Shaoping Meng A uniaxial cyclic constitutive model for strain-hardening cementitious composites (SHCCs) is proposed based on the response of the material at the stress–strain level under different loading regimes. The ascending branch of the compressive envelope curve...