本文選題：自復(fù)位結(jié)構(gòu) + 新型鋼板剪力墻��； 參考：《蘇州科技大學(xué)》2017年碩士論文

【摘要】：為了提高鋼板剪力墻的耗能性能與整體結(jié)構(gòu)的復(fù)位性能,本文在開蝴蝶形縫鋼板剪力墻的基礎(chǔ)上,提出了一種新型的鋼板剪力墻—帶邊緣加勁的單個(gè)蝴蝶型鋼板剪力墻。新型鋼板剪力墻不僅具有開蝴蝶形縫鋼板剪力墻延性好、耗能性能高的特點(diǎn),還具有空間利用合理、試件加工便捷等優(yōu)勢。為進(jìn)一步對這種新型的鋼板剪力墻進(jìn)行研究,在BASE試件基礎(chǔ)上,改變鋼板剪力墻的厚度、鋼板兩側(cè)加勁肋的厚度、鋼絞線的數(shù)量、鋼絞線的面積、跨高比、軸壓比以及內(nèi)填蝴蝶形鋼板剪力墻的數(shù)量,利用有限元軟件對系列試件進(jìn)行模擬,得出滯回曲線、骨架曲線、耗能曲線、承載力退化曲線以及剛度退化曲線。然后,結(jié)合試件的變形和應(yīng)力云圖進(jìn)行分析。結(jié)果表明:1)結(jié)構(gòu)能夠滿足設(shè)計(jì)要求,鋼框架在循環(huán)加載過程中處于彈性階段,震后復(fù)位性能良好,可繼續(xù)投入使用,而單個(gè)加勁蝴蝶形鋼板剪力墻屈服后進(jìn)入塑性耗能,震后不能再重復(fù)使用,將其替換即可使結(jié)構(gòu)恢復(fù)使用功能。2)加勁肋與鋼板焊接連接,直接決定著結(jié)構(gòu)的耗能及復(fù)位性能。在板厚不變的情況下,稍微增大加勁肋的厚度,將使結(jié)構(gòu)的承載力和耗能性能略有提升,對試件的剛度和穩(wěn)定承載力起到很好地補(bǔ)強(qiáng)效果,不會影響結(jié)構(gòu)的剛度退化。軸壓比作用會使結(jié)構(gòu)出現(xiàn)P-Δ效應(yīng),隨著軸壓比增加,承載力會降低。框架的跨高比較低時(shí),試件在加載過程中會形成斜向拉力帶,耗能性能提升。但跨高比越小的框架,試件的復(fù)位性能越差。3)經(jīng)過合理設(shè)計(jì),選取鋼板厚度6mm、兩側(cè)加勁肋厚度3.5mm、初始預(yù)拉力175kN并控制試件的高厚比在440左右,選取框架的跨高比1.7,能夠使結(jié)構(gòu)在耗能理想的同時(shí)達(dá)到預(yù)期的復(fù)位效果。4)當(dāng)內(nèi)填鋼板數(shù)量增加時(shí),鋼板的厚度應(yīng)減小,但板厚較低時(shí),結(jié)構(gòu)的耗能性能較差,滿足不了抗震性能設(shè)計(jì)要求。經(jīng)設(shè)計(jì)得出,內(nèi)置兩塊板時(shí),宜選取4mm試件,高厚比控制在660左右;內(nèi)置三塊板時(shí),宜選取3mm試件,高厚比控制在880左右。此外,在用鋼量相同的情況下,單塊蝴蝶形鋼板剪力墻的抗震性能優(yōu)于多塊蝴蝶形鋼板剪力墻。5)本文所研究的鋼板剪力墻結(jié)構(gòu)兼具自復(fù)位及新型鋼板剪力墻的性能特點(diǎn),能夠滿足設(shè)計(jì)要求,達(dá)到性能目標(biāo)。而多塊鋼板剪力墻將較薄的蝴蝶形鋼板墻提升到了應(yīng)用價(jià)值。
[Abstract]:In order to improve the energy dissipation performance of the steel plate shear wall and the reset performance of the whole structure, a new type of steel plate shear wall, a single butterfly steel plate shear wall with stiffening edge, is proposed on the basis of opening the butterfly shaped steel plate shear wall. The new steel plate shear wall not only has the characteristics of good ductility and high energy dissipation performance, but also has the advantages of reasonable space utilization and convenient processing of specimens. In order to further study this new steel plate shear wall, the thickness of stiffened ribs on both sides of steel plate, the quantity of steel strand, the area of steel strand, the ratio of span to height are changed on the basis of BASE specimen. The axial compression ratio and the number of internally filled butterfly steel plate shear walls are simulated by finite element software. The hysteretic curve, skeleton curve, energy consumption curve, bearing capacity degradation curve and stiffness degradation curve are obtained. Then, the deformation and stress cloud diagram of the specimen are analyzed. The results show that the structure can meet the design requirements, the steel frame is in the elastic stage in the process of cyclic loading, the reposition performance after the earthquake is good, and it can continue to be put into use, while the single stiffened butterfly steel plate shear wall can enter the plastic energy consumption after yielding. After the earthquake, the structure can not be reused again, and its replacement can make the structure resume using function. 2) the stiffener rib is welded to the steel plate, which directly determines the energy consumption and the reset performance of the structure. When the thickness of the plate is constant, the bearing capacity and energy dissipation performance of the structure will be improved slightly by increasing the thickness of the stiffener slightly, and the stiffness and the stable bearing capacity of the specimen will be strengthened well, and the stiffness of the structure will not be affected by the degradation of the stiffness. The effect of axial compression ratio will lead to P- 螖 effect, and the bearing capacity will decrease with the increase of axial compression ratio. When the span height of the frame is low, an oblique tensile band will be formed during the loading process, and the energy dissipation performance will be improved. However, the lower the ratio of span to height, the worse the reposition performance of the specimen is. 3) after reasonable design, the thickness of steel plate is 6 mm, the thickness of stiffened rib is 3.5 mm, the initial pretension 175kN and the ratio of height to thickness of the specimen are controlled at about 440. Selecting the ratio of span to height of the frame at 1.7 can make the structure achieve the expected reset effect at the same time of energy consumption. 4) the thickness of the steel plate should be reduced when the number of steel plates is increased, but the energy dissipation performance of the structure is poor when the thickness of the plate is lower. Can not meet the seismic performance design requirements. The results show that when two boards are built in, the 4mm specimen should be selected, the ratio of height to thickness should be controlled around 660, and when three boards are built in, the 3mm specimen should be selected and the ratio of height to thickness should be controlled at about 880. In addition, the seismic performance of single butterfly steel plate shear wall is better than that of many butterfly steel plate shear walls under the same steel content.) the steel plate shear wall structure studied in this paper has the characteristics of self-reset and new type steel plate shear wall. Ability to meet design requirements and achieve performance goals. And many steel plate shear walls will be thin butterfly steel plate wall to the application value.
【學(xué)位授予單位】：蘇州科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU392.4

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