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在砖混房屋结构中,砖石墙体在不同种类的超应力作用下将产生不同径向的破损裂纹。当屋盖或檐口梁为整体钢筋混凝土结构时,檐口下的墙体容易出现水平或八字形温度裂纹。建在膨胀土或冰冻地区的房屋,若地基、基础处理欠佳而隆起,在墙体上部可能会产生竖向膨胀裂纹。受拉砖石构件的裂纹垂直于拉应力;当其受压或承压时则平行于压应力方向。上述种种裂纹,其径向和机理都比较明显,不用赘述。对于房屋地基有时由于种种原因产生不均匀下沉,这时墙体上将会出现与水平线约成45°角的倾斜裂纹。对于这种裂纹,它怎么是倾斜方向,其机理如何,有
Brick-concrete structure, masonry walls in different types of over-stress will produce different radial damage cracks. When the roof or cornice beam is a whole reinforced concrete structure, the wall below the cornice is prone to horizontal or figure eight temperature cracks. Built in expansive soil or frozen areas of the house, if the foundation, the foundation of poor and uplift, in the upper part of the wall may have vertical expansion cracks. The tensile strength of the tensioned masonry component is perpendicular to the tensile stress and parallel to the direction of the compressive stress when it is under pressure or pressure. Above all kinds of cracks, the radial and mechanism are more obvious, do not go into details. Sometimes, for various reasons, the foundation of a house is unevenly subsided. At this moment, the wall will have inclined cracks at an angle of about 45 ° with the horizontal line. For such a crack, how is it tilted, how its mechanism is, there