混凝土的各向同性损伤模型

Isotropic Damage Model in Concrete An Dongmei

本文以连续损伤力学理论为基础，根据Ｊ．Ｌａｍａｉｔｒｅ（１９７１）提出的“应变等效性假说”，利用“利帕托夫强度理论”￣［１］作为破坏准则，建立了各向同性损伤模型，并运用这一模型时混凝土材料的Ｐｆｅｉｆｆｅｒ和Ｂａｚａｎｔ试件在直剪和压剪载荷作用下的损伤发展过程进行了数值模拟，并与ＳＥＳＷＡＲＴＺ和ＮＭＴＡＨＡ实验结果￣［３］作了比较，二者比较吻合，初步表明了本模型的有效性。

In this paper, an isotropic damage model is established based on damagemechanics theory of continuum and“ strain equivaleuce hypothesis” proposed byLamaitre(1977)and using “Hasomhof strength theory”￣[1] as destroy criterion. Damagedeveloping process for pfeffer and Baznt specimens of conerete materials is modelled nu-merically by the above model,and compared to experiment results by S.E. Swarty andN.M. Taha.￣[3]They are in good agreement.This preliminarily shows equivalence of ourabovce model.