GEODELFT MPILE 4.1.4.2 桩组模型
软件简介—SoftWare Description: GEODELFT MPILE 4.1.4.2 桩组模型

1988年GeoDlft接受荷兰公署要求着手进行停泊海豚的行为研究项目，在项目研究中，显示许多不同的方法在单一的水平插入桩和桩组执行计算，每种方法都有其优点与限制，没有单一的方法可以满足荷兰公署的标准。因此，GeoDlft决定建立一套可以掌握这些计算模型的软件。最大优点将是可适用使用者以相同输入数据从一个模型转换成为另一个模型。这个软件另外标准之一是计算时会考虑到实际使用情况，针对两组桩组模型间的结果是很重要的，显现Mpile是非常实用的软件。 MPile能够透过导入函数，针对单一桩和桩组的三维特性，进行桩帽和土壤可能的相互作用试验。 In 1988 GeoDelft started a research project on the behavior of mooring dolphins. GeoDelft was asked to do so by the Dutch Ministry of Public works. Within the project it was shown that many different methods exist to perform calculations on single horizontally loaded piles and pile groups. Each method has its own advantages, but also limitations. None of the individual methods met all the criteria of the Dutch Ministry of Public works. Therefore GeoDelft decided to build a computer program that would hold several of these calculation models. The great advantage would be that the user could switch from one model to another, using the same input when applicable. One of the extra criteria for this program was that calculation times should still allow for practical use. The resulting program MPile proved to be very useful. For the modeling of pile groups two issues are important. First of all the behavior of individual pile(s) in their own ground profile is taken into account. Secondly one has to account for the behavior (interaction) that each pile imposes on all other piles through the soil and through the superstructure. These issues are addressed in MPile using different models that range from a standard model to more complex models. Construction of Samsoe offshore windfarm, Photo by Elsam A/S. MPile enables the analysis of the three-dimensional behavior of single piles and pile groups, interacting via the pile cap and the soil, as a function of loading. MPile offers for this purpose a unique combination of the internationally accepted design rules of the API (American Petroleum Institute) and special soil interaction models all within the same graphical user interface. One of the great benefits of MPile is that switching between different computational models is very easy since all relevant input data of the previously used model is kept. This flexibility gives the users the opportunity to choose between a fast and simple calculation and a more complex but more accurate calculation, in a way that best suits their particular needs. The choice of models to be used depends principally on the distance between piles. MPile enables the analysis of the three-dimensional behavior of single piles and pile groups, interacting via the pile cap and the soil, as a function of loading. MPile offers for this purpose a unique combination of the internationally accepted design rules of the API (American Petroleum Institute) and special soil interaction models all within the same graphical user interface. One of the great benefits of MPile is that switching between different computational models is very easy since all relevant input data of the previously used model is kept. This flexibility gives the users the opportunity to choose between a fast and simple calculation and a more complex but more accurate calculation, in a way that best suits their particular needs. The choice of models to be used depends principally on the distance between piles. Some specific features of MPile are: Analysis of all pile types, both pre-defined standard or user-defined special piles Pile sections with different properties Options for inclined piles (Cap; Cap Soil Interaction Model and Dynamic Model) Pile head fixed or hinged in the pile cap (clamped or freely rotating) Automated spring generation according to the API for sand and clay layers, for static or cyclic loading, with common input properties Contribution of the pile tip resistance (elastic or elasto-plastic) Load on the cap by moments, horizontal and vertical forces, rotations and displacements Load by horizontal and vertical soil displacements (Cap model) Effect of surcharge (Cap interaction model) Monotonous increasing loads, load reversal and repeated (cyclic) loads Dynamic load by ship collision (Dynamic model), combined with a model for undrained behavior of sand Multiple models for the interaction between piles via the soil Graphical output of displacements, shear forces and moments in top view Graphs of cap displacements and rotations versus loading Graphs of internal forces and soil reactions along the piles Automatic generation of a calculation report with tables and graphs in rich text format Possibility to export plotted data (e.g. to Excel)