half tunnel vault 中文意思是什麼
half tunnel vault
解釋
半隧洞圓頂-
The principal stress value arised alteration, the magnitude of stress closed to 25 ~ 32mpa, its influence scope was within the scope outside of tunnel opening 10 ~ 15 meter, maximum tense focused at vault and middle of floor about half meter. shearing stress focused at corner of vault and wall, always been sheared
主應力量值也發生了較大改變,壓應力可達25 32mpa ,其影響范圍在隧道邊墻外10 15m ;拉應力集中在拱頂和底板中部約0 . 5m范圍內,最大可達10mpa ;在拱腰和墻腳常為剪應力集中區,易發生塑性剪切破壞。
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