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问题:按弹性理论计算肋梁楼盖中板与次梁的内力时,为什么要采用折算荷载?...
Tuesday, April 22, 2025
问题:抗震设计时,为什么设防烈度为9度时,混凝土强度等级不宜超过C60,8度时不宜超过C70?...
Monday, June 30, 2025