内置钢板—冷弯型钢高强混凝土低矮剪力墙抗震性能的试验研究

发布时间：2018-02-28 03:15

本文关键词： 热轧钢板高强混凝土冷弯型钢低矮剪力墙抗震性能　出处：《重庆大学》2016年硕士论文　论文类型：学位论文

【摘要】：内置钢板-冷弯型钢混凝土剪力墙是在冷弯型钢混凝土剪力墙和钢板剪力墙基础上发展而来,结合了两种类型剪力墙的优点,具有延性好、耗能多、变形能力强等特点,适用于高烈度区中高层建筑。地震作用下,高强混凝土低矮剪力墙延性差,容易发生剪切破坏,表现出明显的脆性。热轧钢板力学性能好,经过热处理的钢材,其塑性、韧性、屈服强度、抗拉性能都有所提高。因此,在高强混凝土低矮剪力墙中内置热轧钢板能提高低矮剪力墙的延性,改善其抗震性能。本文主要研究目的是:在低周反复水平荷载作用下,对内置钢板冷弯型钢高强混凝土低矮剪力墙的承载力、破坏特征、耗能、延性等方面进行比较分析,研究内置钢板冷-弯型钢高强混凝土低矮剪力墙的抗震性能。在高烈度区中高层建筑结构设计中,往往更注重剪力墙的延性、变形能力和耗能。本文作者所在团队已完成一系列不同混凝土强度和轴压比的暗藏冷弯薄壁型钢高强混凝土剪力墙低周往复试验,证实了边缘构件的冷弯型钢和中部暗支撑对高强混凝土剪力墙的承载力、延性、耗能等均有不同程度的提高。故本文结合冷弯型钢高强混凝土剪力墙的研究成果,拟研究内置钢板-冷弯型钢高强混凝土低矮剪力墙的抗震性能。本文主要研究工作和成果:(1)设计了2个钢板中心间距为180mm,配钢率分别为1.0%和1.6%的试件,以及2个钢板中心间距330mm,配钢率分别为1.0%和1.6%的试件,对比分析不同配钢率和不同钢板位置下低矮剪力墙的抗震性能。(2)通过低周反复加载试验得到4个构件的滞回曲线和骨架曲线、开裂荷载、极限荷载、极限位移、耗能指标等,得出三个主要结论:1)提高钢板配钢率能有效改善低矮剪力墙的破坏类型,提升其延性和耗能能力,但对极限水平承载力影响不大;2)钢板间距越大,低矮剪力墙的后期水平承载下降越慢,但对极限水平承载力的影响不大。3)内置钢板能有效抑制墙身斜裂缝的加宽和延伸。(3)根据规范分别计算了4个试件的斜截面抗剪承载力,将计算值和实际测量值进行对比,结合试件破坏形态,建议了内置钢板混凝土剪力墙的斜截面抗剪承载力计算公式的适用范围。
[Abstract]:The built-in steel cold-formed steel concrete shear wall is developed in cold-formed steel concrete shear wall and steel plate shear wall on the basis of combining the advantages of two types of shear wall has good ductility, energy dissipation, deformation ability, suitable for high intensity area in the high-rise building. Under earthquake. High strength concrete shear wall ductility, prone to shear failure, showed obvious brittleness. Hot rolled steel mechanical performance, heat treated steel, the ductility, toughness, yield strength, tensile performance is improved. Therefore, the built-in hot rolled steel plate can improve the ductility of the low shear wall in high-strength concrete low shear wall in improving the seismic performance. The main objective of this research is: in the low cyclic loading, the bearing capacity of steel plate of cold-formed steel reinforced high-strength concrete low shear wall, failure characteristics, energy dissipation, ductility etc. Comparative analysis, study on seismic performance of steel plate cold - low shear wall reinforced concrete bending steel. In high intensity area in the structural design of high-rise buildings, often pay more attention to the ductility of shear wall, deformation capacity and energy dissipation. In this paper, the author's team has completed a series of different concrete strength and axial compression ratio of the hidden cold the thin-walled steel reinforced high-strength concrete shear wall under cyclic test, confirmed the cold-formed steel and central concealed bracing bearing capacity, the ductility of high-strength concrete shear wall edge component, energy dissipation have been improved in different degree. So this paper research results combined with cold-formed steel high strength concrete shear wall, steel plate cold bending study steel reinforced high-strength concrete low shear wall seismic performance. The main research work and achievements: (1) the design of the 2 plate center distance is 180mm, with the rate of steel specimens were 1% and 1.6%, 2 and the center of plate spacing 330mm, ratio of steel specimens were 1% and 1.6%, comparative analysis of seismic performance of steel plate with different ratio and different position under low shear wall. (2) through the cyclic loading tests of 4 component hysteretic curves and skeleton curves, cracking load, limit load, limit displacement, energy consumption indicators, draw three main conclusions: 1) improve the failure types of steel plate steel can effectively improve the rate of low rise shear wall and improve the ductility and energy dissipation capacity, but on the ultimate horizontal bearing capacity has little effect; 2) plate spacing is larger, slower decline in late level low shear wall bearing but,.3 has little effect on the ultimate horizontal bearing capacity of the steel plate) widening can effectively inhibit the inclined wall crack and extension. (3) were calculated according to the specification of 4 specimens of oblique section shear capacity, the calculated value and the measured values were compared with. The application scope of the formula for calculating the shear capacity of the inclined section of the built-in steel concrete shear wall is suggested.

【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU398.2;TU352.11

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