- 摘 要
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熊進(jìn)剛1 程文瀼2 周 奎2 桂國慶1（1 南昌大學(xué)土木系 330029； 2 東南大學(xué)土木學(xué)院 南京 210018）
[提要] 現(xiàn)澆鋼筋混凝土板式樓梯的梯段板是有踏步的變截面板，設(shè)計(jì)時(shí)為簡便起見，通常不考慮踏步的作用，板厚取值約為其斜長的1/25～1/30。根據(jù)截面抗彎剛度相等和應(yīng)變能相等兩個(gè)原則，將變截面板轉(zhuǎn)化為等截面板，從理論上分析了踏步對(duì)梯段板抗彎剛度和變形的有利作用，并與試驗(yàn)結(jié)果進(jìn)行了對(duì)比，結(jié)果表明，考慮踏步參與工作及平臺(tái)梁、平臺(tái)板的整體約束等因素對(duì)梯段板抗彎剛度的有利影響，梯段板的厚度可減小至其斜長的1/35～1/40，使板式樓梯的設(shè)計(jì)更為輕巧、經(jīng)濟(jì)。
[關(guān)鍵詞] 板式樓梯 變形 剛度 應(yīng)變能The vari-section stair plate with steps is transformed to the equi-section plate according to stiffness equivalent and strain energy equivalent. The influence of steps on the stiffness and deformation of the stair plate is analyzed and compared with tests. If good effect of steps and the restriction of platform beams and platform on the stiffness and deformation of plate stairs is considered, the thickness of plate can be decreased t0 1/35一1/40 0f the diagonal length of the plate, resulting more economical, light and handy design of plate stairs.
Keywords: plate stairs; deformation; stiffness; strain energy
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