抗震等级是设计部门依据国家有关规定，按“建筑物重要性分类与设防标准”，根据设防类别、结构类型、烈度和房屋高度四个因素确定，而采用不同抗震等级进行的具体设计。以钢筋混凝土框架结构为例，抗震等级划分为一级至四级，以表示其很严重、严重、较严重及一般的四个级别。在中国建筑业中，已经开始严格执行这个等级标准。
地震设防烈度为六度，抗震等级为四级；
Security for the six-times the intensity of the earthquake, seismic rating for four;
较高抗震等级结构的内力调整系数较大，导致小震弹性设计内力放大较多，甚至超过中震的内力设计值。
Higher anti-seismic grade leads bigger adjustment coefficient of internal force, which makes design values of internal force under small earthquake be even more than those under medium earthquake.
建筑抗震设防烈度为8度类别为丙类，抗震等级 剪力墙为二级”，那么在计算锚固长度是，到底是几级啊？
Construction of 8 degree earthquake intensity category C, seismic shear walls for the two levels, "then in the calculation of the anchorage length is, in the end is a few levels ah?"
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