additional internal force meaning in Chinese

附加内力

Instruction about first order analysis method of frames is given by most of the current textbooks on mechanics of structure , and this method is generally used by civil engineers in calculating the internal forces of the frames , however , as the first order analysis does not consider of the additional internal forces caused by the global lateral displacement of the frame , the solution given by this way is obviously not very accurate and safe
目前的结构力学教材一般只讲授框架的一阶内力分析方法，建筑结构设计人员也普遍采用一阶的分析方法对框架进行内力分析。而框架的一阶内力分析未考虑因整个框架侧移引起的内力附加值，这个结果显然是不够精确且偏于不安全的。