竖向变刚度约束砌体结构抗震能力研究

汶川8.0级特大地震发生时,前山断裂从彭州市白鹿中学两栋教学楼中间穿过,断层距离两栋教学楼仅数米,造成前楼严重破坏,破坏现象非常典型。该结构为外廊式单跨约束砌体结构教学楼,抗震设防烈度为7度,承重墙体的构造特点有别于当地的普通砌体结构,本文采用现场测试、震害考察和弹塑性地震反应计算分析等手段对该结构的抗震性能进行了详细的研究,旨在揭示具有这类构造形式的砌体结构在不同烈度影响场下的破坏特点和抗震能力,为指导今后砌体结构的设计和抗震规范的修改提供参考。

A study on the aseismic capacity of the confined masonry structure with variable vertical stiffness

When Wenchuan Ms 8.0 earthquake occurred,the range-front fault of the Longmen Mountain passed through the two teaching buildings of Bailu Middle School in Pengzhou city.The fault is only a few meters from the two teaching buildings.The front building is damaged seriously,and the damage phenomenon is very typical.The front building is a confined masonry structure with single span and cantilevered exterior corridor,and its earthquake fortification intensity is Ⅶ.The construction features of bearing walls are different from those of the local ordinary masonry structures.In this paper,detailed research,depending on the field test,earthquake disaster investigation and calculation analysis of elastic-plastic seismic response,has been conducted.The research is to reveal the damage features and seismic capacity of such kind of construction form in influence fields with different intensity and to provide references for the design of masonry structures and modification of the seismic code in the future.