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理想的拉伸试验方法必须确保测试截面上产生的应力完全均匀。过去已经提出过许多种试验装置,但是没有一种是能够完全消除应力涕度的。这里将介绍一种新的试验方法,其目的在于完全消除测试截面上的应力梯度。这种混凝土直接拉伸试验能在普通的压力试验机上进行。像其他的试验一样,理想的拉伸试验必须满足简单、准确和重演性好的要求。为了确定这一重要但又难以捉摸的特性——混凝土拉伸强度,过去已经提出了许多采用不同测试装置和不同试件形状的试验方法,但没有一种能够满足理想拉伸试验的要求。为了完全不产生应
The ideal tensile test method must ensure that the stress generated on the test section is completely uniform. Many kinds of test devices have been proposed in the past, but none of them can completely eliminate stress strain. A new test method will be introduced here. Its purpose is to completely eliminate the stress gradient on the test section. This direct tensile test of concrete can be performed on an ordinary pressure tester. As with other tests, ideal tensile tests must satisfy simple, accurate, and reproducible requirements. In order to determine this important but elusive feature, concrete tensile strength, many test methods using different test devices and different test piece shapes have been proposed in the past, but none of them can meet the requirements of ideal tensile tests. In order not to produce