【摘要】 为研究酸雨环境中RC剪力墙的抗震性能,设计了6榀剪跨比为2.14的RC剪力墙试件,采用人工气候环境模拟技术对其进行酸雨环境加速腐蚀试验,进而进行拟静力试验,分析轴压比和腐蚀程度对RC剪力墙抗震性能的影响。结果表明:在酸雨溶液中的H⁺和SO₄²⁺共同侵蚀作用下,试件表面出现析出晶体、侵蚀孔洞、骨料外露等现象,且随酸雨侵蚀循环次数增加腐蚀现象不断加重;随腐蚀程度增加,墙底水平裂缝出现时间提前且裂缝之间间距增加,裂缝宽度变宽,试件承载能力、变形能力和耗能能力均有不同程度的退化,峰值点剪切变形及其占总变形比例减小;随轴压比增加,墙体开裂、屈服和峰值荷载增大,裂缝发展速度减慢,但各试件的变形能力和耗能能力不断降低,峰值点剪切变形及其占总变形比例减小。更多还原

【Abstract】 To investigate the seismic behavior of reinforced concrete（RC） shear walls corroded in the environment of an acid rain, six corroded RC shear wall specimens with a shear-span ratio of 2.14 were subjected to accelerated corrosion in a simulated acid environment. The quasi-static tests were carried out, and the seismic behavior of RC shear walls was obtained under different axial compression ratios and degrees of erosion. The results reveal that the precipitated crystals, eroded holes and exposed aggregates appeared on the surface of the RC shear wall concrete due to the combined erosion of H⁺ and SO₄²⁺ in the simulated acid solution, and that the erosion phenomenon was severer with the prolongation of the corrosion. With the increase in the degree of erosion, the horizontal cracks at the bottom of the wall appeared earlier and the spacing between the cracks was larger, the crack width became wider, and the strength, deformation capacity and energy dissipation capacity of the specimens degraded to varying extents. As the axial compression ratio increased, the cracking load, yielding load and peak load of the wall were increased, the crack development was slowed down, but the deformation capacity and energy dissipation capacity of the specimens decreased continuously and the peak point shear deformation and its proportion of total deformation decreased.更多还原