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1、房屋及事故概况 1-1 房屋概况。该四层房屋处于湘南某市城市主干道的西侧,南侧为一条4米宽的小巷,西北侧为一至三层民房,北侧八米远处有一幢七层综合楼的基础正在施工。 房屋平面如图1所示,一层为商业门面,二层～四层为办公和住宿。房屋为砖混结构,二层和屋顶的板下各设一道圈梁240×240mm。在南面的B轴的⑤、⑥轴设有250×250mm的铪构造柱,预应力铪空心板楼屋面,墙体材料为Mu7.5砖,一、二层M5.0
1. Overview of houses and accidents 1-1 Overview of houses. The four-storey house is located on the west side of the main road of a city in southern Hunan. On the south side is a 4-meter wide alley. The northwest side is a one to three-story residential building. On the north side, there is a seven-story comprehensive building whose foundation is under construction. . The housing plane is shown in Figure 1. The first floor is a commercial facade, and the second floor to the fourth floor are office and accommodation. The house is a brick-concrete structure with a ring beam of 240×240 mm under each floor of the second floor and the roof. In the south of the B-axis, the 5th and 6th axes are equipped with a 250×250mm concrete structural column, prestressed concrete hollow building roof, and the wall material is Mu7.5 bricks. The first and second floors are M5.0.