The application of active multiple tuned mass dampers (AMTMD) for suppressing
translational and torsional responses is addressed for a simplified two-degree of
freedom structure, able to represent the dynamic characteristics of general
asymmetric structures subject to ground motions. By employing the developed
optimum parameter and effectiveness criteria of the AMTMD, the influences of
the normalized eccentricity ratio and the torsional-to-translational frequency
ratio of asymmetric structures on the optimum parameters and effectiveness of
the AMTMD are investigated in detail. For comparison purposes, the results of a
single active tuned mass damper also are taken into consideration
本文档为混凝土原材料检测项目及频率（含明细表），包括：资料概况： 混凝土搅拌的最短时间应符合下列规定： a) 当采用搅拌运输车运送混凝土时，其搅拌的最短时间应符合设备说明书的规定，并且每盘搅拌时间（从全部材料投完算起）不得低于30s, 在制备C50以上强度等级的混凝土或采用引气剂、膨胀剂、防水剂时应相应增加搅拌时间。 b) 当采用翻斗车运送混凝土时，应适当延长搅拌时间。 冬期施工搅拌混凝土时，宜优先采用加热水的方法提高拌合物温度，也可同时采用加热骨料的方法提高拌合物温度。当拌合用水和骨料加热时，拌合用水和骨料的加热温度不应超过下表规定，当骨料不加热时，拌合用水可加热到60℃以上。应先投入骨料和热水进行搅拌，然后再投入胶凝材料等共同搅拌。（GB50164-混凝土质量控制标准）等。
