【作者】 孙维才；

【导师】 洪雷；

【作者基本信息】 大连理工大学 ， 结构工程， 2006， 硕士

【摘要】 本文利用钢纤维和石墨等材料作为导电相，对渗浇砂浆进行了电性能改性，利用SIFCON制造工艺，成功制成了石墨砂浆渗浇钢纤维混凝土(Graphite Slurry Infiltrated Fiber Concrete，简称GSIFCON)。文中对GSIFCON的导电性能和机敏性能进行了研究，并根据工程应用的需要，研究了GSIFCON在各种荷载作用下的自感知、自诊断、自适应等能力。论文共分为四部分，具体内容如下： 1、在对GSIFCON的导电性能测试过程中，本文对各种测试方法进行了比较分析，选择既能较好地测量GSIFCON的电阻率变化、又能适应工程中应用的测试方法，为将研究成果应用于实际工程做好初期的准备工作。 2、对由GSIFCON浇筑而成的棱柱体进行轴心受压试验，在加载过程中，通过预埋于试件中的电极测量试件中部GSIFCON的电阻率的变化情况，将其与试件的轴向位移、纵向应变和横向应变进行比较。结果表明：GSIFCON具有压敏性能。 3、对由普通混凝土和GSIFCON叠合而成的小梁进行三分点加载试验，测试小梁上部和下部的GSIFCON电阻率的变化情况，并将其与荷载、小梁跨中的挠度、应变以及小梁的破坏情况等进行比较分析。分析结果表明，GSIFCON具有拉敏性能。 4、将GSIFCON叠合于钢筋混凝土梁中的不同位置，并在梁的纯弯区和剪弯区布置电极。通过对钢筋混凝土梁施加单调加载、不同加载制度的循环加载、多次循环加载等加载过程，来分析在各种实际应用中可能遇到的情况时，GSIFCON对梁的变形、挠度、应变以及梁本身的健康情况等的监测能力。试验结果表明：GSIFCON具有对结构的健康情况等进行监测、检测等机敏性能。更多还原

【Abstract】 After changing the electric conductivity of infiltrated motar, the graphite slurry infiltrated fiber concrete (GSIFCON) is configured using the processing technique of SIFCON, as well as taking steel fibers and graphite as conductive media in this paper. The electric conductivity and alert performance are studied. Moreover, for the aim of requirements for the application of projects, the capabilities of self-sensing 、 self-diagnosing 、 self-adapting et under different loading states are investigated. The four parts of this paper are listed as follows:1. In the conductivity test of SIFCON, the paper studies several different methods of measure, to select the best method, which could be better in measuring fractional resistance increase of GSIFCON and be suitable for projects, and does the initial preparation for the using of the study in projects.2. During the pressure test of prizmoids made of GSIFCON, the paper measures the fractional resistance increase of GSIFCON in the middle of prizmoids by the electrode boards buried in advance, and compares it with displacement 、 longitudinal strain and lateral strain, then gets the conclusion: GSIFCON has the capability of sensing compression stress.3. During the bending tests at the trisection point of short beams made up of concrete and GSIFCON, measures the fractional resistance increase of GSIFCON in the top and the bottom of short beams simultaneously, and compares them with load、 flection of the middle cross section and the health of short beams, then gets the relation between them. The results of the tests show that, GSIFCON has the capability of sensing tensile stress.4. Replaces concrete in the top and the bottom of reinforced concrete girder with GSIFCON, and buries the electrode boards made by stainless steel cloth in GSIFCON in bending parts and shearing parts at the same time. Load reinforced concrete girder under monotone loading、 circle unequal loading and equal load times without number, to simulate the different situation which could be met in using, and study the capability of GSIFCON in sensing displacement、 flection、 strain and health of beam. The results of tests tell us that, GSIFCON has good capability in sensing the health of structure.更多还原