均布荷载作用下四边简支预制带肋底板混凝土双向叠合板的简化弹性计算方法

发布时间：2019-03-01 19:22

【摘要】：预制带肋底板混凝土双向叠合板(简称双向叠合板)呈正交构造异性板特征,工程设计不能直接沿用现浇板的查表法进行弹性计算.针对正交构造异性特征影响的均布荷载作用下四边简支双向叠合板的弹性计算,采用正交构造异性板理论求解挠曲面基本微分方程,得到了挠度及弯矩表达式,通过形式变换,引入等效跨度比,将双向叠合板等效为双向同性板进行计算,提出了双向叠合板的简化弹性计算方法.通过编程计算得到强、弱方向刚度比为2和0.5时不同跨度比下双向叠合板的跨中弹性系数,与基于等效跨度比查双向同性板得到的弹性系数进行了对比,结果表明本文方法准确可行.
[Abstract]:Precast two-way laminated slab with ribbed floor (referred to as bi-directional laminated plate) is characterized by orthonormal structure, so the method of checking table of cast-in-place slab can not be used for elastic calculation directly in engineering design. In view of the elastic calculation of simply supported bi-directional laminated plates with four sides under uniform load affected by orthotropic characteristics, the basic differential equation of deflection surface is solved by using orthotropic plate theory, and the expressions of deflection and bending moment are obtained, and the expressions of deflection and bending moment are obtained by means of the transformation of form. The equivalent span ratio is introduced and the bi-directional laminated plates are equivalent to two-way isotropic plates. A simplified elastic calculation method for two-way laminated plates is proposed. The mid-span elastic coefficients of two-way laminated plates with different span ratios with strong and weak direction stiffness ratios of 2 and 0.5 are calculated by programming, and the elastic coefficients obtained from the equivalent span ratio are compared with those obtained from the two-way homogeneous plates based on the equivalent span ratio. The results show that this method is accurate and feasible.
【作者单位】：湖南科技大学土木工程学院;湘潭市建筑设计院;
【基金】：国家自然科学基金资助项目(51308207) 湖南省教育厅科研项目(14C0439)
【分类号】：TU37

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