与其它增强混凝土结构相比，纤维织物增强泥凝土结构具有防腐、医疗器材的防磁化、重量轻、承载力强和高韧性等显著的优势。由于其广泛的应用背景，织物增强混凝土的发展。尤其是在弄清和提高织物与混凝土之间的粘接陛能方面引起了众多的羌注。本文通过拉拔和数值模拟得到了高性能精细混凝土与碳纤维织物之间粘接性能的试验结果，其中拉拔试验所采用的碳纤维编织物分别进行了无涂层、SBR（丁二苯乙烯）沫层以及环氧树脂浸渍处理。拒试验过程中。一部分织物没有预加应力，而其它织物则在混凝土完全浇筑成形之前施加了预应力。试验结果表明，氧树脂浸渍、SBR涂层以及预加应力可以太幅度提高粘接强度。基于混凝土微平面模型和一种新型的以应力滑移关系定义的粘接单元模型，本文对拉拔试验进行了非线性有限元数值模拟，结果与试验符合得很好。确利于深入了解纤维织物和混凝土之间的粘接性能。

Assuming the weakest link concept. A probalilistic model of fracure in concrete structures has been developed in terms of the critical stress intensity factors. The probabilistic model, wodel, which is expressed in the form of the Weiball distribution, has been compared with arange of experimental results in the literature. The results predicted by the formula are in good agreement with the values reported in the literature for four test secimen geometries-compact tension spectimens, notched three-point bend specinens, wedge splitting spectimens and compact compression specimens. The results presented in the paper have been applied to predict the fracture in large concrete dams and the results compare favourably with observed craking.

The influence of the fracture process zone (FPZ) on the fracture properties is one of the hottest topics in the field of fracture mechanics for cementitious meaterials. Within the FPZ in front of a traction free crack. Cohesive forces are distributed in accordance with the softening stress-separation constitutive relation of the material. Therefore, further crack propagation necessitates energy dissipation, which is the work done by the cohesive forces. In this paper gƒ the local fracture energy charaxterizing the energy consumption due to the cohesive forces, is discussed. The computaional expression of gƒ in the FPZ can be obtained for any stage during the material fracture process regarding the variation of FPZ, whether in terms of its length or width. Gƒa, the average energy consumption along the carack extension region. hsa also been computed and discussed in this paper. Thee experimental results obtained from the wedge splitting tests on specimens with different initial notch ration are employed to investigate the property of the local fracture energy gƒ and the average value Gƒa over the crack extension length. These results can be used to indicate the influence of the FPZ. Additionally, changes in the length of the FPZ during the fracture process are also studied.

基于裂纹端部存在与其裂纹面相垂直的二相细短纤维分析模型，采用叠加原理推导了求解纤维表面应力分布函数的积分方程，通过简化得到了该方程的解析表达显式，该积分方程的特征值方程是纤维几何参数，材料常数以及纤维相对于裂纹位置的相关函数，当材料参数不满足特征方程时，积分方程将具有唯一解；并借助数值方法，给出了纤维剪应力分布算例，和纤维对应力强度因子的影响。

通过27根不同剪跨比的试件对钢骨高强混凝土短柱的位移延性进行了研究，分析了配箍率对钢骨高强混凝土短柱延性的影响，并得出了配箍率和延性间的关系曲线。增加配箍率可以提高短柱的延性，因此可以将轴压力系数限值适当放宽。本文根据试验结果，提出了满足一定延性要求的、对应于不同配箍率的钢骨高强混凝土短柱轴压力系数限值。