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某五层框架结构综合楼,建筑面积2600m~2,1～2层为商场,3～5层为住宅,平面呈 L 形,使用2年后在房屋两端和 L形交角处的屋面板发现45°裂缝,屋面一端的女儿墙开裂。发生裂缝位置的房间尺寸为2.4m×6m、3.9m×3.5m、3.9m×2.6m,板厚90mm,板裂缝长1.5～4.2m,板上下已透缝
A five-storey building with a gross floor area of 2600m ~ 2 and 1 ~ 2 floors is a shopping mall, floors 3-5 are residential buildings, and is L-shaped in plan. After two years of roofing at the two ends of the house and the L-shaped corner, 45 ° crack, the daughter of the wall at one end of the wall cracking. The size of the room where the crack is located is 2.4m × 6m, 3.9m × 3.5m, 3.9m × 2.6m, plate thickness 90mm, plate crack length 1.5 ~ 4.2m,