- 摘 要
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沈蒲生 舒興平 許君期
（湖南大學(xué)土木工程學(xué)院 長(zhǎng)沙 410082）[提要] 冷軋帶肋鋼筋預(yù)應(yīng)力混凝土空心板在荷載部分卸除后，裂縫具有很好的閉合性。建議在設(shè)計(jì)此類(lèi)板時(shí)，將裂縫控制方法由按受拉區(qū)拉應(yīng)力控制改為按裂縫開(kāi)展寬度控制，并完成了19塊冷軋帶肋鋼筋混凝土空心板的裂縫閉合性能試驗(yàn)，給出了按裂縫開(kāi)展寬度控制的計(jì)算公式。
[關(guān)鍵詞] 冷軋帶肋鋼筋 預(yù)應(yīng)力混凝土 空心板 裂縫開(kāi)展寬度 控制方法Cracks in prestressed hollow-core slabs reinforced with cold rolled ribbed bars will be well closed after partially unloaded. A control method of crack width is proposed instead of the control method of tensile stress in tensile zone of the slabs when the slabs are designed. 19 prestressed hollow-core slabs reinforced with cold rolled ribbed bars have been tested and calculating formulas of crack width control aregiven.
Keywords: cold rolled ribbed bar; prestressed concrete; hollow-core slab; crack width; control method
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