![]() As early as 1965, Cheung and Zienkiewicz developed finite element methods for analyzing slabs on elastic foundations of both liquid and solid types. However, the finite element method is undoubtedly one of the mainstream methods due to its outstanding flexibility and acceptability. With the development of electronic computers, many different numerical methods have been employed in the rigid pavement structure analysis in the past several decades, such as finite element method (FEM), discrete element method (DEM), boundary element method (BEM), and finite difference method (FDM). Traditional available analytical solutions may not realistically account for complex loads, mixed boundary conditions, and arbitrary geometry. It is of great significance for reasonable measures determination, design, and construction technology improvement. Ĭarrying out the analysis of the PCCP structure can comprehensively obtain the mechanical response and failure mechanism under the traffic load, temperature gradient, and other environmental factors. (5) Many distresses, including blowup, corner break, pumping and water bleeding, transverse and longitudinal cracks, and joint faulting, may occur frequently under the comprehensive influence of traffic loads and temperature changes, thus resulting in the sharp decrease of pavement performance. Transverse joints are often doweled for better load transfer, and adjacent slabs may be tied at longitudinal joints. (4) The plate should be discontinuous due to longitudinal and transverse joints distributed between adjacent slabs. (3) As been exposed to natural circumstances, Portland cement concrete slabs experience seasonal and daily temperature changes deeply, while the performance of subgrade is also severely dependent on water and temperature conditions. Furthermore, the positions of the loads are not fixed during the travel time. In addition to static effects, the load dynamic effects such as movement, impact, or vibration are very strong. These loads may be vertical or horizontal. (2) The pavement system is repeatedly subjected to various wheel/axle load combinations with different speeds. Some of the major features of PCCP are summarized below: (1) It consists of several different materials, such as fines, coarse aggregate, cement-stabilized material, and cement concrete, which are of strong nonlinearity, nonuniformity, and anisotropy. IntroductionĪs an important part in the transportation infrastructure, Portland cement concrete pavement (PCCP) is generally regarded as a layered system composed of surface course, base course, subbase course, and bed course built on subgrade. The research results clarify the performance of the two software products for structural analysis of cement concrete pavement and indicate each application conditions from their respective features, which can provide valuable references for software users and program developers. Based on one specific case example, the two software products were conducted to demonstrate their main functions. The comparisons focus on some key factors of modeling and solution strategies, such as element type, meshing, traffic load and temperature curling, boundary conditions, and contact conditions. The similarities and differences between these two programs are compared. From the application viewpoint, the capabilities and characteristics of two typical professional finite element software products, named KENSLABS and EverFE, are analyzed. In this course, the student will be able to understand the various topics and terminologies used in pavements (reinforced and unreinforced pavements.The structural mechanics analysis of the Portland cement concrete pavement (PCCP) is considerably complicated and distinctive. It has been developed by researchers at the Illinois Institute of Technology (IIT) and is now being made available to the public.īasic Knowledge of Pavements, Flexible and Rigid pavements, Usage of Geosynthetics in construction IIT Pave is a software package that facilitates rapid, accurate and reliable flexible pavement design. As such, flexible pavement design has taken on greater importance in recent years. With the ever-growing demand for optimized infrastructure, meeting safety, environmental and budgetary requirements has become even more challenging. Pavement design has always been a complex and critical process in roadway engineering. IIT Pave Software and Design of Pavements: Design of Unreinforced and Reinforced Pavements, Geosynthetics, Ground Improvement Techniques Pavement Design software (IIT Pave), Design of Pavement section, Flexible Pavement, Geosynthetics, Civil Engineering What you'll learn:
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