...建筑结构 关键词］复合地基；变刚度；桩土应力比；桩土荷载分担比 [gap=868]Keywords:composite foundation; variation rigidity; pile soil stress ratio; pile soil proportion of load ..
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这种方法可用于承受任意荷载的等刚度和变刚度梁。
This method is available for beams of both constant stiffness and variable stiffness subjected to any transverse loadings.
实际计算表明，这个方法比变刚度法有更大的适用性。
Through calculations it is found that this method is more applicable than the variable stiffness method.
空气弹簧具有变刚度特性，其振动频率要比钢板弹簧低得多。
Air springs have characteristics of variable stiffness, and their natural frequency are much lower than leaf springs.
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