Shear lag is reduced for prestress in serviceability limit state .
在正常使用状态下，预应力平抑了箱梁剪力滞效应。
The concept of serviceability limit state and ultimate limit state is considered.
而且本文考虑了正常使用极限状态和剥离极限状态的概念。
Thermal effects should be taken into account when checking serviceability limit states.
核查正常使用极限状态时必须考虑热作用。
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