弯起筋应同时满足 ( ) 、() 、() ,当设置弯起筋仅用于充当支座负弯矩时,弯起筋应同时满足 斜截面抗弯;正截面抗弯 ,当允许弯起的跨中纵筋不足以承担支座负弯矩时,应增设支座负直筋。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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