对建0筑物进行抗震加固时,一般须使新、老结构件紧密地联成一体,才能有效地提高建筑物的抗震能力.因此,所选用的联结措施是否可靠,关系重大.以多层砖房后加钢筋混凝土圈梁或构造柱为例,以往多采用钢筋混凝土销键联结,是因为它本身具有较高的抗剪能力.但是,销键施工时,会对砌体造成损伤,劳动强度也较大,更为重要的是施工操作困难,不易保证销键混凝土浇 In the seismic strengthening of buildings and structures, the new and old structures must generally be closely integrated to effectively improve the seismic resistance of the buildings. Therefore, the selected coupling measures are reliable and relevant. For example, reinforced concrete ring beams or structural columns are added after the brick house. In the past, reinforced concrete pin joints were used in many cases because of its high shear resistance. However, when the pin construction is performed, it will cause damage to masonry and labor. The strength is also greater, and more important is the difficulty of construction operations, and it is not easy to ensure that the pin-key concrete is poured