混合结构用砖或砌块做墙、钢筋混凝土或预应力混凝土做楼板的房屋。因其施工简便、造价低，是应用最广的一种结构形式；但自重较大，墙体的抗地震性能较差,为改善其抗震性能,在内外墙交接处和外墙转角处增设钢筋混凝土构造柱，也称抗震柱。构造柱与楼、屋面的圈梁连接，以提高房屋的整体性、强度与变形能力。墙体如用空心砌块砌筑时，可用钢筋插入上下贯通的砌块孔洞中,在孔洞内灌注混凝土，形成钢筋混凝土柱,增加房屋的抗地震能力。

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