1993年,法國Bouygues實驗室研制出了活性粉末混凝土（Reactive powder concrete,簡稱RPC）。RPC是由水泥、活性礦物摻合料、石英砂、高效減水劑以及水按一定比例攪拌后在一定養(yǎng)護條件下結(jié)硬的新型水泥基復合材料,它具有超高強度、超高韌性和優(yōu)異耐久性等優(yōu)點。RPC中不含粗骨料,不存在膠凝體與粗骨料之間的初始裂縫,使得RPC在受力之后,不存在由于膠凝體與骨料之間微裂縫的發(fā)展而引起橫向膨脹的問題。因此,在豎向荷載作用下,RPC的受力性能將呈現(xiàn)新特點,所以研究螺旋式箍筋對RPC的約束作用具有現(xiàn)實意義。本文以800 MPa級螺旋箍筋約束RPC100圓柱軸心受壓性能試驗研究為題,開展了以下幾個方面的工作:（1）通過試驗得到了所研究的RPC抗壓強度、峰值壓應變、彈性模量、泊松比等力學性能指標。同時,通過試驗得到了HRB600鋼筋的屈服強度、抗拉強度、屈服應變、最大力下的拉應變等力學性能指標以及800 MPa級中等強度預應力鋼絲的比例極限、名義屈服強度、抗拉強度、最大力下的拉應變等力學性能指標,以及獲得了HRB600鋼筋和PC800級中等強度預應力鋼絲的應力-應變關(guān)系曲線;... 

【文章來源】：哈爾濱工業(yè)大學黑龍江省 211工程院校 985工程院校

【文章頁數(shù)】：71 頁

【學位級別】：碩士

【文章目錄】：
摘要
Abstract
Chapter 1 Introduction
    1.1 Background, objective and significance of the subject
    1.2 Overseas and domestic research status
        1.2.1 Research statue of RPC
        1.2.2 Research statue of confined concrete
    1.3 Main research contents of this subject
Chapter 2 Spiral stirrups confined RPC circular columns tests
    2.1 Introduction
    2.2 Specimens design
    2.3 Materials properties
        2.3.1 Mechanical properties of RPC
        2.3.2 Mechanical properties of reinforcing bars
    2.4 Specimens preparation
        2.4.1 Steel cage preparation
        2.4.2 Specimens preparation
    2.5 Loading scheme and data collection
        2.5.1 Loading scheme
        2.5.2 Data collection
    2.6 Test results
    2.7 Compressive behavior of spiral stirrups confined concrete
        2.7.1 ACS-1
        2.7.2 ACS-2
        2.7.3 ACS-3
        2.7.4 ACS-4
        2.7.5 ACS-5
    2.8 Brief summary
Chapter 3 Lateral response of spiral stirrups confined RPC
    3.1 Introduction
    3.2 Effects of transverse reinforcements on the compression behavior of confinedconcrete
    3.3 Lateral response of confined concrete
        3.3.1 Axial stress-lateral strain relationships
        3.3.2 Lateral strain-axial strain response
        3.3.3 Effects of volumetric ratio of transverse reinforcements
        3.3.4 Modeling lateral strain-axial strain response
    3.4 Lateral strain prediction model of transverse reinforcements
        3.4.1 Theoretical analysis
        3.4.2 Peak lateral strain predictions
        3.4.3 Calculation of effective confining pressure
    3.5 Brief summary
Chapter 4 Axial stress-strain behavior of spiral stirrups confined RPC
    4.1 Introduction
    4.2 Axial stress-strain response of confined RPC
    4.3 Axial stress-strain relationships prediction models of confined RPC
    4.4 Strength and deformation calculation of confined RPC
        4.4.1 Peak stress
        4.4.2 Peak strain
        4.4.3 Ultimate strain
    4.5 Brief summary
Conclusions
結(jié)論
References
Acknowledgement



本文編號：3112235