A skin-like cellulose biomimetic hydrogel was prepared based on dynamic covalent chemistry, which realized the combination of ultra-stretchability, self-healing, adhesiveness, antibacterial and mechano-stimuli sensitivity within a single structure.

Summary Twelve half‐scale flanged reinforced concrete (RC) shear wall specimens with high‐strength stirrup were tested to failure under cyclic loading. The effects of axial load ratio, aspect ratio, and web confinement on seismic performances were critically examined. All specimens showed an expected flexural‐dominant behavior, with the crushing of the compressed concrete and the buckling of reinforcement at the boundary elements. The axial load ratio was found to have significant effects to the seismic behavior of the shear walls. Higher loading capacity and lower ductility capacity can be achieved with increases in the axial load ratio. The hysteretic curves of the walls were all unsymmetrical, especially in T‐shaped walls. The specimens showed higher strength and stiffness, but lower ductility capacity when the web was in compression. The use of high‐strength stirrups can effetely confine the compressed concrete and postpone bucking of longitudinal rebars in the free web boundary, thus preventing premature failure when web was in compression. The plastic deformation capacity of all the test specimens was all excellent, and the ultimate drift ratio of all specimens greatly exceeded the allowable inter‐story drift ratio value (1/120) of RC shear wall in accordance with the design provisions of Chinese GB50011‐2010 code.

SUMMARY The study concentrated on investigating the relationship of the continuous cumulative damage, macroscopic deformation development and failure process of mid‐rise shear walls. Nonlinear fiber element model considering the effect of cumulative damage is proposed for evaluating the seismic performance of shear wall. Numerical analyses of shear wall specimens are carried out according to the proposed model to obtain the evolution of damage index of the shear wall. Experiments of six L‐shaped shear wall specimens subjected to reversed cyclic loading are carried out to verify the proposed model. Correlation of damage index and performance level is established, which provides good reference for the safety assessment of the structure under seismic type of loading. The model is efficient to evaluate the seismic performance of shear wall proved by the satisfactory agreement between analytical and experimental results. Copyright © 2012 John Wiley & Sons, Ltd.

SUMMARY Shear wall systems are the most commonly used lateral load resisting systems in high‐rise buildings. Six 1:2 scale mid‐rise T‐shaped reinforced concrete shear wall specimens with aspect ratio of 1.75, 2.15 and 2.80 were respectively tested under reversed cyclic loading. The seismic behavior and displacement ductility were investigated. The effects of aspect ratio, axial load level and transverse steel ratio on the seismic behavior and displacement ductility were also analyzed. Test results were discussed and compared with T‐shaped steel–concrete composite shear wall. Results mainly showed that the T‐shaped shear wall specimens mainly presented bending–shear failure mode and were all destroyed because of the concrete crushing at the web (negative direction) and the longitudinal reinforcement of the web reaching the limited deformation (positive direction), showing that the web was the weakest part of T‐shape shear wall. The ductility of the specimens was decreased, and the ultimate load‐bearing capacity was increased by increasing the axial load. To specimens with smaller aspect ratio and higher axial load ratio, the special transverse steel ratio of the web should be increased to improve the crushing strain of the confined concrete of the web in order to satisfy the ductility of the walls. The seismic performance was obviously improved in the T‐shaped steel–concrete shear wall compared with that of the T‐shaped reinforced concrete shear wall. Copyright © 2011 John Wiley & Sons, Ltd.