吉恩镍业主厂房澳炉区结构设计

介绍了大型冶炼厂高层主厂房结构设计方案和技术要点,针对工业建筑各层质量分布差异较大、楼板大开洞等情况提出了结构选型须注意的问题和处理方法,为同类工程结构设计提供参考。

Distribution of acceleration and empirical formula for calculating maximum acceleration of rockfill dams

To find the distribution patterns of dynamic amplification coefficients for dams subjected to earthquake, 3D seismic responses of concrete-faced rockfill dams with different heights and different shapes of river valley were analyzed by using the equivalent-linear model. Statistical analysis was also made to the seismic coefficient, and an empirical formula for calculating the maximum acceleration was provided. The results indicate that under the condition of the same dam height and the same base acceleration excitations, with the increase of the river valley width, the position of the maximum acceleration on the axis of the top of the dam moves from the center to the riversides symmetrically. For the narrow valleys, the maximum acceleration occurs in the middle of the axis at the top of the dam; for wide valleys the maximum acceleration appears near the riversides. The result negates the application of 2D dynamical computation for wide valleys, and shows that for the seismic response of high concrete-faced rockfill dams, the seismic coefficient along the axis should be given, except for that along the dam height. Seismic stability analysis of rockfill dams using pseudo-static method can be modified according to the formula.

大底盘多塔楼结构抗震设计要点初探

本文以框筒高层塔楼模型和多层框架裙房模型为研究对象,通过对单体计算结果与大底盘多塔计算结果的比较,研究分析大底盘多塔楼结构地震响应特点及构件内力分布规律。分析表明,在现有技术条件下,大底盘多塔楼的设计是可行的。该种结构形式不仅可以明显改善建筑的使用性能,在一定的条件下还能获得很明显的经济性。本文进一步总结出多塔楼大底盘设计的设计要点,供同类项目参考。