钢板带加强型型钢混凝土低矮剪力墙抗震性能试验研究
发布时间：2018-09-10 06:15
【摘要】：本课题组前期完成的剪跨比为1.0的内置竖向型钢混凝土低矮剪力墙的试验研究发现,在剪力墙中部配置竖向型钢能够有效地阻断低矮剪力墙对角主斜裂缝的开展,提高了墙体的变形性能。为进一步提高低矮剪力墙的极限变形能力,本文在墙体中部配置竖向型钢的基础上,提出了在墙体底部增设钢板带的加强方案,拟通过钢板带和内置竖向型钢组成横、纵向约束,达到进一步改善内置竖向型钢混凝土低矮剪力墙抗震性能的目的。本文设计和完成了2片剪跨比为1.0的钢板带加强型内置竖向型钢混凝土低矮剪力墙低周往复水平加载试验,并与1片未设置钢板带的内置竖向型钢混凝土低矮剪力墙试验进行对比分析,研究不同钢板带设置方式对剪力墙抗震性能的影响,应用有限元软件VecTor2模拟了钢板带加强型型钢混凝土低矮剪力墙水平加载全过程。本文得出的主要结论如下:(1)钢板带的适当设置能进一步改善内置竖向型钢混凝土低矮剪力墙的变形性能,使破坏区分布更加均匀,试件的总耗能提高70%左右,极限位移角提高20%左右,并大于1/100。(2)钢板带的设置能提高内置竖向型钢混凝土低矮剪力墙的承载力。(3)剪力墙底部钢板带设置的数量不能过多,钢板带对剪力墙的约束从墙底到墙顶应该满足由强到弱的渐变规律,避免底部约束过强形成局部刚性区域,导致墙体的集中破坏区域上移,影响墙体整体变形能力的发挥。(4)有限元软件VecTor2模拟钢板带加强型型钢混凝土低矮剪力墙试件的结果与试验拟合较好。
[Abstract]:The experimental study on the low-rise shear wall with a shear span ratio of 1.0 completed by our research group shows that the vertical steel in the middle of the shear wall can effectively block the development of diagonal main diagonal cracks in the low shear wall. The deformation property of the wall is improved. In order to further improve the ultimate deformation capacity of low shear wall, this paper puts forward a strengthening scheme of adding steel strip to the bottom of the wall on the basis of the vertical section in the middle of the wall. The longitudinal constraint can further improve the seismic performance of the built-in vertical steel reinforced concrete low-rise shear wall. In this paper, two steel plates with a shear span ratio of 1.0 are designed and tested under low cycle reciprocating horizontal loading. And compared with the test of a built-in vertical steel reinforced concrete shear wall without steel strip, the influence of different steel plate and strip setting methods on the seismic behavior of shear wall is studied. Finite element software VecTor2 is used to simulate the whole process of horizontal loading of steel strip reinforced steel reinforced concrete low rise shear wall. The main conclusions obtained in this paper are as follows: (1) the proper setting of steel strip can further improve the deformation performance of the low-rise shear wall with built-in vertical steel reinforced concrete, make the distribution of the failure zone more uniform, and the total energy consumption of the specimen is increased by about 70%. The ultimate displacement angle is increased by about 20% and is more than 1 / 100. (2) the setting of steel strip can improve the bearing capacity of the built-in vertical steel reinforced concrete low shear wall. (3) the number of steel plate belts at the bottom of the shear wall should not be too large. The restraint of steel strip on the shear wall from the bottom of the wall to the top of the wall should satisfy the law of gradual change from strong to weak, so as to avoid the local rigid region formed by the over-strong constraint at the bottom of the wall, which leads to the upward movement of the concentrated failure area of the wall. (4) the finite element software VecTor2 is used to simulate the specimen of steel reinforced concrete low shear wall with reinforced steel sheet, and the results fit well with the test results.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.2;TU352.11
[Abstract]:The experimental study on the low-rise shear wall with a shear span ratio of 1.0 completed by our research group shows that the vertical steel in the middle of the shear wall can effectively block the development of diagonal main diagonal cracks in the low shear wall. The deformation property of the wall is improved. In order to further improve the ultimate deformation capacity of low shear wall, this paper puts forward a strengthening scheme of adding steel strip to the bottom of the wall on the basis of the vertical section in the middle of the wall. The longitudinal constraint can further improve the seismic performance of the built-in vertical steel reinforced concrete low-rise shear wall. In this paper, two steel plates with a shear span ratio of 1.0 are designed and tested under low cycle reciprocating horizontal loading. And compared with the test of a built-in vertical steel reinforced concrete shear wall without steel strip, the influence of different steel plate and strip setting methods on the seismic behavior of shear wall is studied. Finite element software VecTor2 is used to simulate the whole process of horizontal loading of steel strip reinforced steel reinforced concrete low rise shear wall. The main conclusions obtained in this paper are as follows: (1) the proper setting of steel strip can further improve the deformation performance of the low-rise shear wall with built-in vertical steel reinforced concrete, make the distribution of the failure zone more uniform, and the total energy consumption of the specimen is increased by about 70%. The ultimate displacement angle is increased by about 20% and is more than 1 / 100. (2) the setting of steel strip can improve the bearing capacity of the built-in vertical steel reinforced concrete low shear wall. (3) the number of steel plate belts at the bottom of the shear wall should not be too large. The restraint of steel strip on the shear wall from the bottom of the wall to the top of the wall should satisfy the law of gradual change from strong to weak, so as to avoid the local rigid region formed by the over-strong constraint at the bottom of the wall, which leads to the upward movement of the concentrated failure area of the wall. (4) the finite element software VecTor2 is used to simulate the specimen of steel reinforced concrete low shear wall with reinforced steel sheet, and the results fit well with the test results.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.2;TU352.11
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