Use of CFRP Grid as Shear Transfer Mechanism for Precast Concrete Sandwich Wall Panels.
Use of CFRP Grid as Shear Transfer Mechanism for Precast Concrete Sandwich Wall Panels.
复制标题
使用 CFRP 网格作为预制混凝土夹芯墙板的剪切传递机制。
DOI：
--
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
G. Sopal
中科院分区：
文献类型：
--
作者：
G. Sopal
索帕尔，高塔姆·贾扬特。CFRP格栅作为预制混凝土夹芯墙板剪力传递机制的应用。(由Sami H.Rizkalla指导)。纤维增强聚合物(FRP)材料作为一种替代建筑材料已被广泛应用于多种土木工程领域。本文介绍了FRP材料在预制工业中的应用，更具体地说，混凝土夹芯板通常用作许多结构的承重墙板和建筑围护结构。这项研究考察了碳纤维增强聚合物(CFRP)材料作为预制混凝土夹芯板的主要剪切传递机制的使用，该材料配置为格栅，并与硬质泡沫绝缘材料复合作用。使用这些材料的动机是它们能够在两个混凝土怀特之间提供复合作用，从而允许更大的结构容量、更高的热效率和更长的使用寿命。该研究项目调查了几个据信影响CFRP格栅(CGRID)/泡沫隔热材料机理的剪切流动强度的参数的影响，包括刚性隔热泡沫的类型、CFRP格栅的间距和泡沫隔热厚度。为确定电网/绝缘层剪切传递机制的特性，进行了全面的实验研究。根据试验结果建立了计算CGRID/硬质泡沫体系剪切流动强度和剪切模数的设计方程。采用非线性三维有限元程序对试件的受力性能进行了模拟，并研究了其他几个参数对试件性能的影响。选择了具有不同破碎和开裂特性的实体单元来模拟混凝土和刚性泡沫材料。接触单元采用库仑摩擦理论来模拟不同层间界面的剪切传递机制。用非线性弹簧单元模拟了CGRID的断裂和屈曲行为。极限强度和复合作用的程度取决于CGRID/刚性泡沫和混凝土之间的粘结的联合作用。用CFRP格栅作为预制混凝土夹层墙板的剪力传递机制Gautam Jayant Sopal向北卡罗来纳州立大学研究生院提交的部分满足哲学博士学位要求的论文
SOPAL, GAUTAM JAYANT. Use Of CFRP Grid As Shear Transfer Mechanism For Precast Concrete Sandwich Wall Panels. (Under the direction of Sami H. Rizkalla). Fiber Reinforced Polymer (FRP) material has been accepted as an alternative construction material for several civil engineering applications. This thesis presents the use of FRP material for the precast industry and more specifically Concrete Sandwich Panels typically used as bearing wall panels and building envelopes of many structures. The research examines the use of a Carbon Fiber Reinforced Polymer (CFRP) material, configured as a grid and placed in composite action with rigid foam insulation, as the main shear transfer mechanism for precast concrete sandwich panels. The motivation for the use of these materials is in their ability to provide composite action between the two concrete wythes, allowing for greater structural capacity, higher thermal efficiency, and a longer service life. The research program investigated the effect of several parameters believed to affect the shear flow strength of the CFRP grid (CGRID)/foam insulation material mechanism, including the type of rigid insulating foam, the spacing between rows of CFRP grids, and the thickness of the foam insulation. A comprehensive experimental program was conducted to determine the characteristics of the shear transfer mechanism of the grid/insulation. Test results are used to develop design equations to estimate the shear flow strength and shear modulus for CGRID/rigid foam system as affected by these parameters. A non-linear 3-D finite element program was used to model the behavior of the test specimens and to study the behavior under several other parameters is presented. A solid element with different crushing and cracking characteristics are selected to model the concrete and the rigid foam materials. Contact elements are used by means of Coulomb Friction theory to model the shear transfer mechanism at the interface between the different layers. Rupture and buckling behavior of CGRID was simulated by non-linear spring elements. The ultimate strength and the degree of composite action were found to depend on the combined action of the bond between CGRID/Rigid foam and concrete. Use Of CFRP Grid As Shear Transfer Mechanism For Precast Concrete Sandwich Wall Panels by Gautam Jayant Sopal A dissertation submitted to the Graduate Faculty of North Carolina State University in partial fulfillment of the requirements for the Degree of Doctor of Philosophy