The direct design approach is applied not only in the simple-span beams with external post-tensioning, but also in the multi-span frame beams.
直接计算方法不但对简支梁适用，对比较普遍的多跨框架梁，而按单跨进行体外索布索加固的情形也是可行的。
The direct design approach is applied not only in the simple-span beams with external post-tensioning, but also in the multi-span frame beams.
直接计算方法不但对简支梁适用，对比较普遍的多跨框架梁，而按单跨进行体外索布索加固的情形也是可行的。
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