混凝土结构物多处于复杂的多轴应力状态,而目前我国仍以混凝土的单轴抗压强度为标准进行设计,没有考虑多轴应力下的混凝土的性能,这样无论从建筑物的安全方面还是经济方面都是不太合理的.此外,由于电子计算机和有限单元法的广泛应用,使了解混凝土在多轴应力状态下的应力应变关系已成为迫切的问题. Concrete structures are mostly in complex multi-axial stress states. At present, China still designs concrete with uniaxial compressive strength. It does not consider the performance of concrete under multiaxial stress, so that it is not only from the safety aspect of buildings but also from the economy. The aspects are all unreasonable. In addition, due to the extensive application of computer and finite element method, it has become an urgent problem to understand the stress-strain relationship of concrete in multi-axial stress state.