【摘要】：本課題組前期完成的剪跨比為1.0的內(nèi)置豎向型鋼混凝土低矮剪力墻的試驗(yàn)研究發(fā)現(xiàn),在剪力墻中部配置豎向型鋼能夠有效地阻斷低矮剪力墻對(duì)角主斜裂縫的開(kāi)展,提高了墻體的變形性能。為進(jìn)一步提高低矮剪力墻的極限變形能力,本文在墻體中部配置豎向型鋼的基礎(chǔ)上,提出了在墻體底部增設(shè)鋼板帶的加強(qiáng)方案,擬通過(guò)鋼板帶和內(nèi)置豎向型鋼組成橫、縱向約束,達(dá)到進(jìn)一步改善內(nèi)置豎向型鋼混凝土低矮剪力墻抗震性能的目的。本文設(shè)計(jì)和完成了2片剪跨比為1.0的鋼板帶加強(qiáng)型內(nèi)置豎向型鋼混凝土低矮剪力墻低周往復(fù)水平加載試驗(yàn),并與1片未設(shè)置鋼板帶的內(nèi)置豎向型鋼混凝土低矮剪力墻試驗(yàn)進(jìn)行對(duì)比分析,研究不同鋼板帶設(shè)置方式對(duì)剪力墻抗震性能的影響,應(yīng)用有限元軟件VecTor2模擬了鋼板帶加強(qiáng)型型鋼混凝土低矮剪力墻水平加載全過(guò)程。本文得出的主要結(jié)論如下:(1)鋼板帶的適當(dāng)設(shè)置能進(jìn)一步改善內(nèi)置豎向型鋼混凝土低矮剪力墻的變形性能,使破壞區(qū)分布更加均勻,試件的總耗能提高70%左右,極限位移角提高20%左右,并大于1/100。(2)鋼板帶的設(shè)置能提高內(nèi)置豎向型鋼混凝土低矮剪力墻的承載力。(3)剪力墻底部鋼板帶設(shè)置的數(shù)量不能過(guò)多,鋼板帶對(duì)剪力墻的約束從墻底到墻頂應(yīng)該滿足由強(qiáng)到弱的漸變規(guī)律,避免底部約束過(guò)強(qiáng)形成局部剛性區(qū)域,導(dǎo)致墻體的集中破壞區(qū)域上移,影響墻體整體變形能力的發(fā)揮。(4)有限元軟件VecTor2模擬鋼板帶加強(qiáng)型型鋼混凝土低矮剪力墻試件的結(jié)果與試驗(yàn)擬合較好。
[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.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU398.2;TU352.11

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本文編號(hào)：2233622