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模拟地震作用,对天津地区的原状饱和粘性土的剪切模量和阻尼特性作了比较广泛的试验研究.研究后认为,动态剪切模量和阻尼比随剪应变的变化规律可分别以单一的经验公式来表示。经归一化后,前者在平面上表示为单一的一根曲线,后者则表现为一簇曲线或两端是尖灭、。形的带状区.比较了由动力三轴试验测定的和根据其它相关性的试验数据换算得到的剪切模量参数,取得合理性的一致.对阻尼比随应变变化的规律提出发展性的看法。对天津地区某些饱和粘性土层提供了若干可用于地震设计的动态剪切模量和阻尼比参数。
In order to simulate the earthquake action, a wide range of experimental study was conducted on the shear modulus and damping characteristics of the original saturated clay in Tianjin area. After the study, it was considered that the dynamic shear modulus and damping ratio with the shear strain can be separately The empirical formula to express. After normalization, the former is represented on the plane as a single curve, while the latter is represented as a cluster of curves or ends are annihilated. In the ribbon zone, the shear modulus parameters obtained from the dynamic triaxial test and the experimental data obtained from other correlations are compared and the rationality is obtained. The development of the law of damping ratio with strain is proposed. view. Some dynamic clay shear modulus and damping ratio parameters that can be used in seismic design are provided for some saturated clay layers in Tianjin.