V形折板屋盖是板、梁合一的结构构件。我国自1968年开始试验以来,很快得到推广和发展,据不完全统计:全国各省、市已建面积达250万平米以上。在折板发展过程中,12米以上跨度一般均采用预应力折板,非预应力折板使用则限制在12米以下。其实,普通钢筋混凝土工艺更加简单,可节约台座和设备投资,可预先在施工点场地上预制,因 V-shaped folding roof is a plate, beam structure of the structural components. Since our experiment began in 1968, our country has quickly been promoted and developed. According to incomplete statistics, all the provinces and municipalities in China have built more than 2.5 million square meters of land. In the flap development process, the span of more than 12 meters are generally prestressed flap, non-prestressed flap use is limited to 12 meters below. In fact, the ordinary reinforced concrete process is more simple, can save the pedestal and equipment investment, pre-prefabricated at the construction site due to