密肋复合墙板等效弹性常数计算方法研究

STUDY ON CALCULATING FORMULAS OF EQUIVALENT ELASTIC CONSTANTS OF MULTI-RIBBED WALL SLAB

为了解决密肋复合墙板材性复杂 ,弹性常数不易确定的问题 ,通过对墙板构造的分析 ,按照截面上混凝土含量不变的原则 ,经二次单向纤维加强 ,将密肋复合墙板等效为正交各向异性的纤维加强复合材料 ,建立了墙板的复合材料力学模型 ,提出了墙板弹性常数的理论计算公式 ,在此基础上进一步将等效墙板简化为各向同性模型 ,提出实用弹性常数计算方法 。

Due to the complexity of constitute materials,multi ribbed wall slabs′elastic constants are difficult to define.To solve this problem,the paper equals prototype slab to orthotropically fiber reinforced slab,according to the rule that the equivalent concrete section area of the latter remains the same as that of the former through fiber strengthening in horizontal and vertical direcions.The paper also establishes a mechanical model of equivalent slab.Meanwhile,the theoretical calculating formulas of elastic consants are derived.By simplifying the multi ribbed wall slab to equivalent slab made of isotropic material,practical formulas of elastic constants are given,which provide theoretical basis for engineering designing.