在结构承受较大初始荷载情况下，二次受力问题对加固梁的抗弯刚度、极限承载能力、延性存在一定影响；
When the initial load is big, the secondary load could influence the performances of CFRP reinforcement on all aspects as mentioned above.
按照这种方法，只须在结构上施加一组虚拟荷载，进行一次静力求解即可得到指定截面的内力影响线。
By applying a set of virtual concentrated loads to the structure and performing a static solution once only, the desired influence line can be obtained.
计算软土次固结的常用方法没有反映荷载变化的影响，实际上只适用于正常固结土。
The conventional method to compute secondary consolidation of soft soils does not reflect the influence of load. It is only applicable to the normally consolidated soils actually.
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