建筑结构的很多研究工作常常需要借助于模型试验,其中包括用砖和混凝土这类脆性材料所制成的模型。这类构件在一般应力状态下,破坏时变形均很微小,属于脆性破坏。很多试验研究表明,脆性破坏强度在很大程度上取决于试件的局部强度,因此,试验数据离散性较大,但总的来看是随试件尺 Many studies of building structures often require the use of model tests, including models made of brittle materials such as brick and concrete. In the general stress state, these members are very small in deformation and are brittle. Many experimental studies have shown that the brittle failure strength depends to a large extent on the local strength of the test piece. Therefore, the experimental data are more discrete, but the overall point of view is the size of the test piece.