OpenSees的全称是Open System for Earthquake Engineering Simulation（地震 u(.e8~s8
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 %)8}X>x q
盟“太平洋地震工程研究中心”（Pacific Earthquake Engineering Research Center， Q~]uC2Mw
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 LKB$,pR~1l
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。 CJx|? yK2
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 cxC6n%!;y
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 k/_ 59@)
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 H [\o RId
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 =U9*'EFr
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 /)>3Nq4Zx
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The Open System for Earthquake Engineering Simulation m4Qh%}9%
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. K&]G3W%V
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Capabilities )yZ^[uJ}3C
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. /]Md~=yNp
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Modeling 'XjZ_ng
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. Vaw+.sG`AP
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Analysis }@q`%uzi
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. A i?*s%8v
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Development Process 9 -a0 :bP
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. Zt{[ *~
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