本文選題：鋼板暗支撐 + 高阻尼剪力墻　； 參考：《湖南大學(xué)》2016年博士論文

【摘要】：高阻尼混凝土具有較好的抗沖擊韌性和阻尼性能,將其用于結(jié)構(gòu)中,可以吸收并耗散地震時(shí)輸入結(jié)構(gòu)的能量,是混凝土技術(shù)的一個(gè)發(fā)展方向�，F(xiàn)有的耗能減振措施一般是過(guò)在結(jié)構(gòu)中通附加阻尼裝置來(lái)耗散地震輸入結(jié)構(gòu)中的能量,避免結(jié)構(gòu)在強(qiáng)震作用下過(guò)早發(fā)生破壞,這往往給設(shè)計(jì)和施工帶來(lái)諸多不便。在高阻尼混凝土研究的基礎(chǔ)上,結(jié)合現(xiàn)有的高阻尼混凝土剪力墻的研究成果,提出了高阻尼混凝土帶鋼板暗支撐的新型剪力墻結(jié)構(gòu)。為提高抗震投入的經(jīng)濟(jì)效益,提出在塑性區(qū)用部分高阻尼混凝土剪力墻代替全部由高阻尼混凝土澆筑的剪力墻;為了進(jìn)一步提高阻尼混凝土剪力墻的延性,提出了用具有超高延性高阻尼ECC在塑性區(qū)部分澆筑的剪力墻結(jié)構(gòu)。本文進(jìn)行了上述相關(guān)試驗(yàn)研究和理論分析。主要內(nèi)容和結(jié)果如下:(1)進(jìn)行了2組9種不同配比下的ECC材性實(shí)驗(yàn),研究了聚灰比、單一乳液和乳液共混對(duì)ECC材料的基本力學(xué)性能的影響,得到了阻尼增強(qiáng)效果較優(yōu)的摻料百分比;完成了9種不同配比下ECC懸臂梁在不同振幅下的阻尼測(cè)試,獲得了ECC懸臂梁的阻尼比與變形的變化關(guān)系。在此基礎(chǔ)上,提出了增強(qiáng)阻尼ECC懸臂梁構(gòu)件阻尼比的計(jì)算理論與方法兩折線阻尼比理論模型。(2)完成了2片部分高阻尼混凝土帶鋼筋暗支撐剪力墻的抗震性能試驗(yàn),獲得了剪力墻在靜力反復(fù)荷載作用下的破壞模式、承載力、滯回曲線以及耗能能力等抗震性能指標(biāo)。試驗(yàn)分析表明,用部分高阻尼混凝土來(lái)替代全部由高阻尼混凝土澆筑剪力墻,其承載力和延性相差較小,且能節(jié)約工程造價(jià),在經(jīng)濟(jì)上更具合理性;與部分高阻尼混凝土剪力墻試驗(yàn)結(jié)果相比,部分高阻尼ECC剪力墻延性和變形能力無(wú)顯著差別,但其開(kāi)裂荷載和峰值荷載有較大程度的提高,剛度退化較小。(3)完成了2片高阻尼混凝土帶鋼板暗支撐雙肢剪力墻的低周反復(fù)加載試驗(yàn)。與已有試驗(yàn)結(jié)果的對(duì)比,高阻尼混凝土帶鋼板暗支撐雙肢剪力墻的開(kāi)裂荷載、極限承載力、后期剛度、變形能力、耗能能力均有一定程度的提高。在試驗(yàn)過(guò)程中,首先在連梁端部形成較為明顯的塑性鉸,其次墻肢邊框柱底部混凝土被壓酥而發(fā)生明顯的破壞,屈服破壞機(jī)制具有明確的兩道抗震防線。該新型剪力墻體系能有效提高抗震能力,具有一定的工程實(shí)用意義。將該新型剪力墻結(jié)構(gòu)用于工程中,更有利于結(jié)構(gòu)的抗震。(4)通過(guò)理論分析,提出了以開(kāi)裂點(diǎn)、屈服點(diǎn)、峰值點(diǎn)和極限點(diǎn)為特征點(diǎn)并考慮剛度退化的帶暗支撐剪力墻四線型荷載-位移回復(fù)力模型,并給出了各特征點(diǎn)參數(shù)以及各階段剛度計(jì)算公式。采用本文提出的四折線復(fù)力模型所的計(jì)算滯回曲線與試驗(yàn)滯回曲線吻合較好。分別采用MSC.MARC和ABAQUS有限元軟件模擬了剪力墻的受力性能,模擬結(jié)果與試驗(yàn)結(jié)果吻合較好。(5)剪跨比、軸壓比和墻肢配筋率是影響剪力墻塑性鉸長(zhǎng)度的主要因素。在數(shù)值模擬的基礎(chǔ)上,利用MATLAB軟件擬合出了單一影響因素對(duì)塑性鉸長(zhǎng)度的影響。進(jìn)而,通過(guò)多參數(shù)擬合,提出了在主要因素影響下的塑性鉸長(zhǎng)度計(jì)算模型。按剪跨比和軸壓比的不同,統(tǒng)計(jì)得到了剪力墻在同性能階段的性能目標(biāo),為剪力基于性能的設(shè)計(jì)提供參考和依據(jù)。完善了基于位移的變形能力的剪力墻結(jié)構(gòu)體系的抗震設(shè)計(jì)方法,并給出了剪力墻配箍特征的計(jì)算方法。
[Abstract]:High damping concrete has good impact toughness and damping property. It can absorb and dissipate the energy of the input structure when it is used in the structure. It is a development direction of concrete technology. The existing energy dissipation measures are generally used to dissipate the energy in the seismic input structure through additional damping loading in the structure to avoid the junction. A new type of shear wall structure with high damping concrete steel plate with dark support is put forward on the basis of the research of high damping concrete and the research results of high damped concrete shear walls. In order to further improve the ductility of the damped concrete shear wall, a shear wall with a super ductility and high damping ECC in the plastic zone is put forward in order to further improve the ductility of the damped concrete shear wall. The contents and results are as follows: (1) 2 groups of 9 different ratios of ECC wood properties were carried out. The effect of ash ratio, single emulsion and emulsion blending on the basic mechanical properties of ECC materials was studied. The percentage of better damping effect was obtained, and the damping test of ECC cantilever beam under different amplitudes under 9 different proportions was completed. The relationship between the damping ratio and the deformation of the ECC cantilever beam is obtained. On this basis, the theory and method of the damping ratio of the reinforced damping ECC cantilever beam are proposed. (2) the test of the resistance to the shear walls of the dark braced shear walls of 2 parts of the high damping concrete with the reinforced concrete is completed, and the static load of the shear wall in the shear wall is obtained. The failure mode, bearing capacity, hysteretic curve and energy dissipation capacity under the load are measured. The experimental analysis shows that a part of high damping concrete is used to replace all high damped concrete cast shear walls. The bearing capacity and the ductility of the concrete are small, and it can save the engineering price and be more reasonable in economy. Compared with the soil shear wall test results, there is no significant difference in the ductility and deformability of some high damping ECC shear walls, but the cracking load and peak load are greatly improved, and the stiffness degradation is smaller. (3) the low cycle repeated loading tests of 2 slices of high damping concrete with dark braced double shear walls have been completed. The cracking load, the ultimate bearing capacity, the later stiffness, the deformability and the energy dissipation capacity of the high damped concrete with the steel plate with the steel plate are improved to a certain extent. In the process of the test, the more obvious plastic hinge is formed at the end of the continuous beam, and the concrete is destroyed obviously at the bottom of the wall of the wall of the wall, and the yield is broken. The bad mechanism has a clear two anti seismic line. The new shear wall system can effectively improve the anti-seismic capacity, and has a certain practical significance. The new shear wall structure is used in the engineering and is more conducive to the earthquake resistance of the structure. (4) through theoretical analysis, the characteristic points of the cracking point, the yield point, the peak point and the limit point are put forward and the stiffness of the new shear wall is considered and the stiffness is considered and the rigidity of the shear wall is considered and the rigidity of the shear wall is considered and the rigidity of the shear wall is considered and the rigidity of the shear wall is considered and the rigidity of the shear wall is considered. The four linear load displacement restoring force model with a degenerate dark braced shear wall is presented, and the parameters of each characteristic point and the stiffness calculation formula of each stage are given. The calculated hysteretic curve of the four fold reforce model proposed in this paper is in good agreement with the test hysteretic curve. The shear walls are simulated by MSC.MARC and ABAQUS finite element software respectively. The simulation results are in good agreement with the experimental results. (5) the shear span ratio, the axial compression ratio and the reinforcement ratio of the wall are the main factors affecting the plastic hinge length of the shear walls. On the basis of the numerical simulation, the impact of the single influence factor on the length of plastic hinge is fitted by the MATLAB software, and the main reasons are proposed by the multi parameter fitting. According to the difference of the shear span ratio and the axial compression ratio, the performance target of the shear wall at the same sex energy stage is obtained according to the difference of the shear span ratio and the axial compression ratio, which provides the reference and basis for the design of shear based on the performance. The seismic design method of shear wall structure system based on the displacement ability is perfected, and the stirrup of shear wall is given. The calculation method of the sign.

【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2016
【分類號(hào)】：TU398.2;TU352.11

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