【摘要】 通过9片HPFL(High Performance Ferrocement Laminate)条带加固空斗墙与5片未加固的对比墙体,在低周反复荷载下试验,研究采用不同的HPFL条带加固方式对不同砌筑方式、不同强度砌筑砂浆的空斗墙在不同竖向压应力下的抗震承载力和破坏形式的影响。采用有限元计算软件AN-SYS建立HPFL条带加固空斗墙的有限元模型,分析加固条带宽度、加固面层砂浆强度、加固层钢筋网格尺寸、砌筑砂浆强度、墙体高宽比和竖向压应力等因素对加固效果的影响。研究表明:HPFL条带加固法是一种提高空斗墙抗震性能的有效方法;加固条带宽度对HPFL条带加固性能的影响最大;加固面层砂浆强度的提高,墙体的抗震承载力随之提高;加固层钢筋网格尺寸加密,对墙体承载力提高较小;不同砂浆强度砌筑的墙体,HPFL条带加固效果的发挥情况有所不同;HPFL条带圈梁构造柱式加固方式对各种高宽比和各种竖向压应力下的空斗墙都是有效的。更多还原

【Abstract】 Based on the experimental study of nine row lock walls strengthened with HPFL(High Performance Ferrocement Laminate) and five comparative walls subjected to horizontal low-cycle loading,the seismic behavior and failure pattern of the row lock walls are studied,with the influence of the masonry mode,masonry mortar strength and compressive stress.The various influence factors are analyzed by using the finite element model,which is implemented by using ANSYS,such as HPFL strip width,reinforced mortar strength,steel mesh size,masonry mortar strength,aspect ratio and compressive stress.The results show that the strengthening method is an effective way in upgrading the seismic capacity of row lock wall.The HPFL strip width has the most important influence on strengthening effect.The seismic capacity increases with reinforced mortar strength increasing.The ultimate capacity increases slightly with steel mesh size reducing.With different masonry mortar strength,the strengthening effect of HPFL is different.The strengthening method is effective in the row lock walls with different aspect ratios and compressive stresses.更多还原