钢绞线混凝土剪力墙的抗震性能研究

发布时间：2018-07-28 06:51

【摘要】：可恢复钢筋混凝土剪力墙是一种新型的减震控制结构。该结构体系的目标是在地震后不需修复或者仅需要少量修复就能快速恢复使用节省在震后重建工作上的人力和物力,缩短民众在震后恢复到正常生活的时间。避免由于震后重建工作的缓慢再次给国家和人民造成巨大的经济损失,从而使整个城市的建筑结构都具有抗震可恢复性。本文利用钢绞线、CFRP筋等线弹性筋材优良的抗拉强度,参照传统剪力墙的设计方法,分别制作了1个钢筋混凝土剪力墙、1个钢绞线—钢筋混凝土剪力墙和1个配有碳纤维增强聚合物(CFRP)筋—钢绞线混凝土剪力墙的足尺试件,进行低周反复荷载试验。通过研究这3个试件的承载能力、抗裂能力、滞回性能、骨架曲线、延性、刚度和耗能能力以及残余变形,对比分析在剪力墙中配置钢绞线和CFRP筋后剪力墙的自恢复性能。试验结果表明:(1)配置CFRP筋和钢绞线的2个试件STSW和CFRWPSW在层间位移角超过2.0%时,水平承载力可以保持继续增加,最大层间位移角均达到了3.0%。(2)墙体暗柱中的钢绞线能够有效减小试件的残余变形。当墙体内纵向钢筋换为CFRP筋时,墙体的残余变形值会减小50%,说明相比传统钢筋混凝土剪力墙,CFRP筋的优良线弹性能有效的控制墙体的残余变形。(3)将暗柱受力钢筋替换为钢绞线和CFRP筋后,剪力墙的刚度退化状态得到缓解,表明钢绞线和CFRP筋的应用能够减缓传统剪力墙进入塑形变形阶段后前期试件刚度的降低速度。(4)在剪力墙中配置CFRP筋和钢绞线能够改善其承载能力和延性性能,控制裂缝的发展。钢绞线—钢筋混凝土剪力墙和CFRP筋剪力墙比传统RC剪力墙有更好的自恢复能力,是一种新颖、合理的抗震自复位剪力墙结构型式,对结构的抗震能力的设计具有十分重要的意义。
[Abstract]:The recoverable reinforced concrete shear wall is a new type of damping control structure. The goal of the structure system is to quickly restore the manpower and material resources that save the post earthquake reconstruction without repair or only a small amount of repair after the earthquake, to shorten the time for the people to return to normal life after the earthquake and to avoid the reconstruction of the earthquake after the earthquake. The slow work has caused great economic loss to the country and the people, so that the structure of the whole city can be aseismic and recoverable. In this paper, 1 reinforced concrete shear walls and 1 steel strands are made by using the fine tensile strength of steel strand, CFRP tendons and other linear elastic tendons. The reinforced concrete shear wall and 1 full scale specimens with carbon fiber reinforced polymer (CFRP) reinforced concrete shear walls are tested in low cycle cyclic loading. Through the study of the bearing capacity, crack resistance, hysteretic behavior, skeleton curve, ductility, stiffness and energy dissipation capacity and residual deformation of the 3 specimens, the shear walls are compared and analyzed in shear walls. The self recovery performance of the steel strand and the rear shear wall with CFRP reinforcement is found. The test results show that: (1) the horizontal bearing capacity of the 2 specimens with CFRP and steel strands, STSW and CFRWPSW, can continue to increase when the interlayer displacement angle is over 2%, and the maximum interlayer displacement angle can effectively reduce the steel strand in the 3.0%. (2) wall column. The residual deformation of the wall can be reduced by 50% when the longitudinal reinforcement is replaced by the CFRP bar in the wall. It shows that the excellent linear elasticity of the CFRP reinforcement can effectively control the residual deformation of the wall compared to the traditional reinforced concrete shear walls. (3) the stiffness degradation of the shear wall is slowed down after the rebar is replaced by the steel strands and the CFRP tendons. The results show that the application of steel strands and CFRP tendons can slow down the speed of the rigidity of the previous specimens after the traditional shear walls enter the plastic deformation stage. (4) the configuration of CFRP tendons and steel strands in the shear walls can improve their bearing capacity and ductility, and control the development of cracks. The steel strand reinforced concrete shear walls and the CFRP reinforcement shear walls are compared to the traditional R. The C shear wall has a better self restoring ability. It is a novel and reasonable structure type of aseismic self reset shear wall, which is of great significance to the design of the seismic capacity of the structure.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.2;TU352.11

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