【正文】 XXXX 大學(xué)本科畢業(yè)設(shè)計（論文） 纖維混凝土板抗彎性能的試驗研究 Investigation on the Flexural Performance of Fiber Reinforced Concrete Plates 學(xué) 院（系）： 土木水利學(xué)院 專 業(yè)： 土木工程 學(xué) 生 姓 名： XXXXXX 學(xué) 號： XXXXXXXX 指 導(dǎo) 教 師： XXXXXXXXXX 評 閱 教 師： 完 成 日 期： XXXXXXXXXX 某某大學(xué) Xxx university 纖維混凝土板抗彎性能的試驗研究 I 摘 要 混凝土具有抗壓強度高、原材料容易獲得、成本相對低廉、易成型、施工相對簡便、經(jīng)久耐用等優(yōu)點，但普通混凝土抗拉強度低，且隨著強度的增大，脆性也明顯增大，在受荷時往往呈現(xiàn)出無明顯征兆的脆性破壞，極大地影響了混凝土的實際工程應(yīng)用，將纖維摻入到混凝土中能夠明顯提高混凝土的抗拉強度，通過阻礙混凝土內(nèi)部微裂縫的產(chǎn)生和發(fā)展增強 混凝土的韌性。 韌性是衡量纖維混凝土開裂后承載性能的重要指標(biāo) , 也是纖維混凝土較之素混凝土的優(yōu)點體現(xiàn)之一。韌性可定義為材料或結(jié)構(gòu)從開始出現(xiàn)裂縫到失效為止吸收能量的能力。纖維混凝土的韌性包括壓縮韌性、彎曲韌性、剪切韌性等，目前廣泛采用彎曲韌性作為衡量纖維混凝土韌性的主要指標(biāo)，其破壞過程更能綜合反映出纖維的增韌效果。 目前對纖維混凝土（ FRC）彎曲韌性的研究主要以纖維混凝土梁（ 150 mm 150 mm 550mm）為研究對象，但是梁式模板的內(nèi)部空間狹小，影響了纖維在混凝土基體中的方向及自由分布，從而導(dǎo)致纖維混 凝土試驗梁與實際工程中纖維方向和分布存在一定程度的差異。本試驗參照梁式構(gòu)件的 RILEM 彎曲韌性試驗方法，通過不同纖維類型、不同纖維摻量的纖維混凝土板（ 600 mm 600 mm 100mm）的彎曲韌性試驗，總結(jié)出了纖維對混凝土基體增強增韌作用的部分規(guī)律。 關(guān)鍵詞： 纖維；纖維混凝土板；彎曲韌性 纖維混凝土板抗彎性能的試驗研究 II Investigation on the Flexural Performance of Fiber Reinforced Concrete Plates Abstract Concrete has many outstanding adva1ntages, such as high pressive strength, easy available raw materials, low energy consumption, relatively cheap and easy to shape, relatively simple for construction, high durability and so on. However, the tensile strength of concrete is really very low, and as the strength increased, the brittleness of concrete increased significantly. So when loaded, the concrete often shows brittle fracture with no obvious signs. That influenced the practical engineering application of concrete greatly. The fibers blended into concrete can significantly improve the tensile strength of concrete. Through resisting the emergence and development of the internal microcracks in concrete, fibers can improve the crack resistance and the toughness of concrete. The toughness is an important indicator for the workability of fiber reinforced concrete, and it is one of advantages of fiber reinforced concrete over plain concrete. Toughness can be defined as the capacity of energy absorption of material or structure from loading to failure. The toughness of fiber reinforced concrete includes pression toughness, flexural toughness and shear toughness, etc. Currently flexural toughness is widely used as a measure of toughness of fiber reinforced concrete. Because flexural failure is happened under three kinds of loadings including bending, tension and pression, it is much better to measure the integrated effect of toughness. Nowadays the traditional method to evaluate the toughness is based on the bending beams（ 150 mm150 mm550mm） . However, the formwork of the beam may show some influence on the fiber orientation and does not correspond to the fiber orientation in the practice such as industrial floor very well. In order to reduce the influence of the formwork on the fiber orientation and to simulate the loading behavior of industrial panel, according to RILEM: Test and design methods for steel fiber reinforced concrete─ Bending test, a series simply supported panel（ 600 mm 600 mm 100mm） test with different fiber types and fiber contents has been carried out. Key Words： Fiber； Fiber Reinforced Panel； Flexural Toughness 纖維混凝土板抗彎性能的試驗研究 III 目 錄 摘 要 ..................................................................................................................................... I Abstract ...................................................................................................................................... II 1 混凝土 .................................................................................................................................. 1 混凝土的主要性質(zhì) ................................................................................................... 1 強度 ................................................................................................................ 1 工作性 ............................................................................................................ 1 耐久性 ............................................................................................................ 4 混凝土的發(fā)展 ........................................................................................................... 7 鋼筋混凝土（ Steel Reinforced Concrete） .................................................. 7 預(yù)應(yīng)力混凝土 （ Prestressed Concrete） ..................................................... 7 高強混凝土（ High Strength Concrete） ...................................................... 7 高性能混凝土（ High Performance Concrete） ........................................... 8 纖維混凝土（ Fiber Reinforced Concrete） ................................................. 8 自密實混凝土（ Selfpacting concrete） ............................................... 9 2 纖維混凝土 ........................................................................................................................ 10 纖維對混凝土 基體增強增韌作用的影響因素 ..................................................... 10 纖維混凝土國內(nèi)外發(fā)展歷史 ................................................................................. 11 鋼纖維混凝土（ Steel Fiber Reinforced Concrete） ............................................. 12 鋼纖維混凝土的優(yōu)點 [24] ........................................................................... 12 鋼纖維混凝土的發(fā)展方向 .......................................................................... 13 合成纖維混凝土 ..................................................................................................... 14 聚丙烯短纖維（ Micro PPfiber） .............................................................. 14 聚丙烯長纖維（ Macro PPfiber） ............................................................. 15 合成纖維與鋼纖維對混凝土基體阻裂效應(yīng)的區(qū)別