OpenSees的全称是Open System for Earthquake Engineering Simulation（地震 o>m*e 7l,
工程模拟的开放体系）。它是由美国国家自然科学基金（NSF）资助、西部大学联 ORXH<;^0y
盟“太平洋地震工程研究中心”（Pacific Earthquake Engineering Research Center， ]XL=S|tIq
简称PEER）主导、加州大学伯克利分校为主研发而成的、用于结构和岩土方面地 C{G%"q
震反应模拟的一个较为全面且不断发展的开放的程序软件体系。 yL l:G ;
OpenSees程序自1999年正式推出以来，已广泛用于太平洋地震工程研究中心 8|+@A1)&4
和美国其它一些大学和科研机构的科研项目中，较好的模拟了包括钢筋混凝土结 LA(/UA3Izd
构、桥梁、岩土工程在内众多的实际工程和振动台试验项目，证明其具有较 j<9^BNl
好的非线性数值模拟精度。该程序正在引起世界各国结构工程领域众多研究人员 * <?KOM
的关注和重视，而在国内也开始有少数学校开展了一些初步的学习和相关的研究 ^?A>)?Sq
工作。 gd]_OY7L
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The Open System for Earthquake Engineering Simulation P8 6wRq
The Open System for Earthquake Engineering Simulation (OpenSees) is a software framework for simulating the seismic response of structural and geotechnical systems. OpenSees has been developed as the computational platform for research in performance-based earthquake engineering at the Pacific Earthquake Engineering Research Center. OpenSees is also the simulation component for the NEESit since 2004. vAOThj )
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Capabilities e<~bD F H
OpenSees has advanced capabilities for modeling and analyzing the nonlinear response of systems using a wide range of material models, elements, and solution algorithms. The software is designed for parallel computing to allow scalable simulations on high-end computers or for parameter studies. OF; "%IW~}
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Modeling X]\; f
OpenSees providing beam-column elements and continuum elements for structural and geotechnical models. A wide range of uniaxial materials and section models are available for beam-columns. ,Hp7`I>/
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Analysis 8k.#4}fP
Nonlinear analysis requires a wide range of algorithms and solution methods. OpenSees provides nonlinear static and dynamic methods, equation solvers, and methods for handling constraints. kn`O3cW/
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Development Process g"g3|$#Ej|
OpenSees is open-source. This website provides information about the software architecture, access to the source code, and the development process. The open-source movement allows earthquake engineering researchers and users to build upon each others accomplishments using OpenSees as community-based software. ] {0OPU
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