新型复合墙体弹性抗侧刚度计算分析

本文结合课题组前期的研究成果,就一种新型结构的主要受力构件———密肋复合墙体的弹性抗侧刚度提出两种计算方法:面积等效法和复合材料法;同时,本文给出了墙体复合材料等效弹性板计算模型。理论分析与试验对比表明:一次面积等效法严格遵从抗弯等效原理,但等效后的墙体截面形状比较复杂,不适用于工程设计计算;二次面积等效法的计算过程相对简单,但等效后所得砌块矩形截面板的抗弯刚度并不等于密肋复合墙体的抗弯刚度,只是简单地按面积等效,缺乏理论依据;由双向纤维单层复合材料模型推导的墙体弹性抗侧刚度计算值与实测值吻合较好,说明该模型具有一定的理论依据和实用价值,可以满足实际工程计算需要。

Calculation Analysis on New Type Composite Wall Elastic Lateral Rigidity

According to the result of former studying, this paper provides two calculating models for calculating the elastic lateral rigidity of multi-ribbed slab wall, which is the main bearing member of a new structural system, equating area method and composite material method. In addition, this paper also provides a calculating model of the equivalent elastic slab to instand the multi-ribbed slab wall. Theoretic analysis and experimental contrast show that when equating area just once, the results can strictly follow the principle of equivalent bending resistance, but the cross sectional shape is complicated after equivalence, so this method doesn't fit the calculation of engineering design; when equating twice, the computation can be more simply, but the bending rigidity of bricky rectangular slab is not equal to that of multi-ribbed slab, it just simply makes area equivalent and lacks theoretic support. The calculating value of elastic lateral rigidity of the wall deduced from the unilayer composite material model of bi-directional fiber is identical with the measured value, which means that this model has certain theoretic basis and practical value, also, it can meet the demand of engineering calculation.