PRISM for Earthquake Engineering                                                                                       Home > Software > Prism

PRISM© is a free program for seismic response analysis of structures idealized as single-degree-of-freedom systems. The main features of the program include modification of earthquake records, calculation of response time histories of various hysteresis models, and generation of elastic and inelastic response spectra.

Main features are:

·         Modification and correction of earthquake records

-      Scaling and truncation of earthquake records

-      Baseline correction

-      Calculation of Arias intensity

·         Inelastic response history analysis

-      Application of various hysteresis models: Linear elastic, Bi-linear, Tri-linear,

    Modified Takeda, Bouc-Wen, and Al-Bermani

-      Calculation of acceleration, velocity, and displacement response histories

-      Monitoring force-displacement relationships

·         Generation of response spectra

-      Generation of elastic spectra

-      Generation of constant-ductility inelastic spectra

-      Representation of spectra in various formats

Installation is not required.

PRISM© is simple and easy. Please download from the link below, extract and save the prism folder on any place of your hard disk, and run prism.exe.

 PRISM is available at the link below.

 [DOWN LOAD] PRISM for Earthquake Engieering v.1.1 (1.0MB)

 [DOWN LOAD] User's Manual for PRISM v.1.1 (pdf - 0.3MB)


 Screen shots of PRISM

·         Modification and correction of earthquake records

·         Inelastic response history analysis

·         Generation of response spectra

Prism is developed to provide engineers, researchers and students with a tool to easily investigate seismic responses of structures. Users may make and distribute unlimited copies of the program in its original form.


This work was supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (KRF-D00644).

Earthquake Engineering Research Group
Department of Architectural Engineering, INHA University

    # 2S413, INHA University, 253 Yonghyun-Dong, Nam-Gu, Incheon, 402-751, South Korea / Tel: +82-32-860-7585 / Fax: +82-32-866-4624   

Last Updated on Sep. 27, 2011  

Tag: prism software, constant ductility spectrum, earthquake spectra, earthquake response spectra, earthquake response spectrum, seismic response spectra, seismic response spectrum, response spectrum generator  
equivalent single degree of freedom system, SDOF oscillator, inelastic dynamic time history analysis, response history analysis, Seong-Hoon Jeong, INHA University, 
프리즘 프로그램 지진파 응답 스펙트럼 내진구조 내진설계 지진 공학 단자유도 시간이력 해석, 인하대학교 건축 정성훈