低剪跨比内嵌钢板-混凝土组合剪力墙抗剪性能试验研究

来源期刊:中南大学学报(自然科学版)2021年第2期

论文作者:刘阳 张世江 郭子雄 武豪

文章页码:579 - 589

关键词:内嵌钢板-混凝土组合剪力墙;低剪跨比;抗剪性能

Key words:steel plate reinforced concrete shear wall; low shear-span ration; shear behavior

摘    要:为研究低剪跨比内嵌钢板-混凝土组合剪力墙的抗剪性能,进行6个低剪跨比内嵌钢板-混凝土组合剪力墙在集中力作用下的抗剪性能试验,研究钢板厚度和剪跨比对低剪跨比内嵌钢板-混凝土组合剪力墙抗剪性能的影响。研究结果表明:试件墙体发生剪切破坏,墙体混凝土形成斜压杆裂缝带,钢板屈服,水平分布钢筋屈曲;当钢板厚度从4 mm提高至8 mm时,试件的受剪承载力提高20.4%~35.1%,变形能力相近;当剪跨比由0.75增大至1.25时,试件的受剪承载力下降6.9%~18.7%,钢板厚度较小的试件受剪承载力下降幅度更大;钢板厚度对试件的残余变形没有明显的影响。对低剪跨比内嵌钢板-混凝土组合剪力墙,按规范JGJ 3—2010和JGJ 138—2016计算得到的受剪承载力计算值约为试验值的83.8%,计算结果偏于安全。

Abstract: To study the shear behavior of low shear-span ration steel plate reinforced concrete shear walls, six low shear-span ration steel plate reinforced concrete shear walls were tested subjected to concentrated load. The influence of steel plate thicknesses and shear-to-span ratio on ow shear-span ration steel plate reinforced concrete shear walls were studied. The results show that all specimens failed in shear of wall web, the wall concrete formed crack zone of diagonal strut, the steel plate is yielded and the horizontal distribution of reinforcement is buckled. When the steel plate thicknesses increase from 4 mm to 8 mm, the shear strength of the wall increases by 20.4%-35.1%, although it does not affect the deformation capacity. When the shear-span ratio increases from 0.75 to 1.25, the shear strength of the wall decreases by 6.9%-18.7%, and the shear strength of the wall with thinner steel plate has a more significant decrease. The residual deformation of the wall is little influence on the thickness of steel plate. The test values indicate that JGJ 3—2010 and JGJ 138—2016 formula produce a conservative estimation of the shear strength of low shear-span ration steel plate reinforced concrete shear walls, with the estimated strength equal to 83.8% of the test values on average.

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