Research Initiation: Experimental and Theoretical Investigation of the Short and Long Term Behavior of a Pultruded Composite Rigid Frame

本文将研究由玻璃纤维增强塑料（FRP）挤压型材截面构成的刚架结构的响应。实验程序将检查全尺寸结构框架在短期加载破坏和长期加载下的行为，其中蠕变变形将是显著的。应变计、玫瑰花结和表盘指示器将用于监测框架中的应变和变形。液压千斤顶和自重将用于加载框架。理论程序将考虑材料的各向异性和粘弹性特性，并开发一个代码来分析短期非线性响应和长期蠕变响应。框架的分析将包括剪切变形的影响，这在复合薄壁梁中是重要的。理论预测的力和挠度将与实验测量的结果进行比较。这项研究的结果将提供重要的数据，将用于发展标准化拉伸纤维增强塑料的分析和设计的未来方法。

The response of rigid frame structures constructed of glass fiber reinforced plastic (FRP) pultruded profile sections will be investigated. The experimental program will examine the behavior of full-sized structural frames under short term loading to failure and under long term loading in which creep deformation will be significant. Strain gages, rosettes, and dial indicators will be used to monitor the strains and deformations in the frames. Hydraulic jacks and dead weights will be used to load the frames. The theoretical program will account for the anisotropic and viscoelastic properties of the material and develop a code to analyze both the short term nonlinear response and the long term creep response. The analysis of the frame will include the effects of shear deformation which is known to be significant in composite thin-walled beams. The theoretically predicted forces and deflections will be compared with those measured experimentally. The results of this investigation should provide important data which will be used to develop future methodologies of analysis and design with standardized pultruded fiber reinforced plastics.