对采用外套预制结构加固的砌体结构足尺实验模型进行了数值模拟研究,研究结果表明加固效果良好,加固后原砌体结构的地震响应大大减小.外套结构采用了预制装配技术,包括预制钢筋混凝土墙片、阳台楼板等.其中,预制钢筋混凝土墙片之间采用角钢和抗剪键焊接连接,进行砌体结构横墙加固；在预制墙片和砌体原纵墙之间设置抗剪键进行纵墙加固.基于通用有限元软件ABAQUS对该模型进行了动力分析,分析结果表明,加固后结构纵横墙两个方向的基底剪力绝大部分由外套结构承担,原砌体结构承担剪力得到有效削弱,大大提高了原结构抗震能力.%Numerical simulation of a full-scale masonry building strengthened by external prefabricated structure is carried out. The results show that seismic response of original masonry building is mitigated effectively after reinforcement. The strengthen technology has achieved good effects. Prefabricated technology is applied in external structure. The precast structural elements include reinforced concrete panels, balcony slabs et al. Different prefabricated panels are welded together through angle steel and shear lug, which is utilized to strengthen the transversal walls of masonry building. Shear lugs are installed between masonry walls and precast reinforced concrete walls to retrofit the longitudinal wall. Dynamic response of reinforced masonry building is analyzed through ABAQUS. The results show that the base shear forces of longitudinal and transverse direction are undertook all mostly by external structure. The base shear forces of masonry building are reduced greatly. Aseismic capability of original masonry building is enhanced effectively.
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