风振计算应按随机振动理论进行，结构的自振周期应按结构动力学计算。
Wind is it it calculates to be should according to shake theory go on, shake cycle should calculate according to structure dynamics structure at random to shake.
现行规范中已存在许多经验公式去描述非抗震设计的钢筋混凝土结构的自振周期与建筑高度的关系。
Some empirical relationships for non-seismic design RC structures are now used in several design codes to relate the fundamental period to the height of a building.
本文研究了修改桥梁结构设计参数，使其自振周期和振型满足预先给定设计要求的动力特性修改过问题，提出了一种求解方法。
This paper presents a method for modifying the designing structural parameters of a bridge structure so that the bridge structure will freely vibrates at prescribed frequencies and modes.
设计地震区的高层建筑时，选择结构的适宜自振周期是十分重要的。
It is important to select reasonable natural period of high-rise building in seismic design.
静力优化设计的优化目标是截面截面应力平方均值最小，动力优化设计的优化目标是结构自振周期平方和最小。
The target of static optimization is to minimize the average of the squared sum of stresses while the target of dynamic optimization is to minimize the squared sum of natural vibration periods.
研究了砖石古塔的结构特性，提出了对古塔自振周期的计算公式。
The paper studied the characteristic of structure of ancient brick and rock pagoda, proposed the formula of self vibration period for ancient pagoda.
相应的也引出了新的课题：结构自振周期更大，地震响应更加强烈，抗震措施更加复杂。
Accordingly leads to a new topic: structural natural periods greater, more intense seismic response, seismic measures more complex.
相应的也引出了新的课题：结构自振周期更大，地震响应更加强烈，抗震措施更加复杂。
Accordingly leads to a new topic: structural natural periods greater, more intense seismic response, seismic measures more complex.
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