[自然科學(xué)]第一章混凝土基本力學(xué)性能-在線瀏覽
2025-05-09 02:08本頁(yè)面
【正文】 本特點(diǎn) ① 微觀內(nèi)應(yīng)力、變形和裂縫狀態(tài)復(fù)雜 ② 變形的多元組成 ③ 應(yīng)力狀態(tài)和途徑對(duì)力學(xué)性能的影響 ④ 時(shí)間和環(huán)境的影響 ? 微觀 —— 復(fù)雜 ? 宏觀 —— 工程精度 Department of Civil Engineering, NUAA 9 Department of Civil Engineering, NUAA 10 Department of Civil Engineering, NUAA 11 Microcrack at Interface of Aggregate and Mortar Expansion of Crack Tip Crack Connecting Damage 受力破壞的一般機(jī)理 Department of Civil Engineering, NUAA 12 Standard Cube Compressive Strength Standard Specimen (Side Length is 150mm) Standard Maintenance (Temperature 20177。 3176。 Complete StressStrain Curve ——— 上升段和下降段 Department of Civil Engineering, NUAA 24 彈簧作為剛性元件 Department of Civil Engineering, NUAA 25 千斤頂作為剛性元件 Department of Civil Engineering, NUAA 26 全曲線方程 幾種理論曲線 Department of Civil Engineering, NUAA 27 Department of Civil Engineering, NUAA 28 px???cyf??我國(guó)規(guī)范（分段式 —— 上升段和下降段）： 2321 ( 3 2 ) ( 2 )1( 1 )a a adx y x x xxxyxx? ? ??? ? ? ? ? ?????上升段和下降段在曲線峰點(diǎn)處連續(xù)。p 2 c0 . 1 2 f? ?Department of Civil Engineering, NUAA 51 （ 3）缺口梁四點(diǎn)受力 p3 tf? ?AB截面彎矩為零，中間段剪力為常值。 pp 4 c t220 . 0 8π ()Tfft D t? ? ? ??Department of Civil Engineering, NUAA 53 （ 5）二軸拉壓
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