Open Access
EDITORIAL
Joel Conte1, Frank McKenna2, Quan Gu3,*
CMES-Computer Modeling in Engineering & Sciences, Vol.120, No.3, pp. 467-470, 2019, DOI:10.32604/cmes.2019.08174
（This article belongs to this Special Issue: Advances in OpenSees Applications to Civil Engineering)
Abstract This article has no abstract. More >
Open Access
ARTICLE
Quan Gu1, Lei Wang1, Surong Huang2,*
CMES-Computer Modeling in Engineering & Sciences, Vol.120, No.3, pp. 471-489, 2019, DOI:10.32604/cmes.2019.05757
（This article belongs to this Special Issue: Advances in OpenSees Applications to Civil Engineering)
Abstract Peridynamics (PD) is a powerful method to simulate the discontinuous problems in civil engineering. However, it may take a lot of effort to implement the material constitutive models into PD program for solving a broad range of problems. OpenSees is an open source software which includes a versatile material library and has been widely used by researchers and engineers in civil engineering. In this context, the paper presents a simple but effective approach to integrate PD with OpenSees by using a Client-Server (CS) software integration technique, such that the existing material constitutive models in OpenSees can be directly used by… More >
Open Access
ARTICLE
Wei Guo1,2, Chen Zeng1,2, Hongye Gou3,*, Yao Hu1,2, Hengchao Xu4, Longlong Guo1,2
CMES-Computer Modeling in Engineering & Sciences, Vol.120, No.3, pp. 491-515, 2019, DOI:10.32604/cmes.2019.06162
（This article belongs to this Special Issue: Advances in OpenSees Applications to Civil Engineering)
Abstract CRTS-II slab ballastless track on bridge is a unique system in China high speed railway. The application of longitudinal continuous track system has obviously changed dynamic characteristics of bridge structure. The bridge system and CRTS-II track system form a complex nonlinear system. To investigate the seismic response of high speed railway (HSR) simply supported bridge-track system, nonlinear models of three-span simply supported bridge with piers of different height and CRTS-II slab ballastless track system are established. By seismic analysis, it is found that shear alveolar in CRTS-II track system is more prone to be damaged than bridge components, such as… More >
Open Access
ARTICLE
Yong Li1,*, Joel P. Conte2, Philip E. Gill3
CMES-Computer Modeling in Engineering & Sciences, Vol.120, No.3, pp. 517-543, 2019, DOI:10.32604/cmes.2019.06269
（This article belongs to this Special Issue: Advances in OpenSees Applications to Civil Engineering)
Abstract In the field of earthquake engineering, the advent of the performance-based design philosophy, together with the highly uncertain nature of earthquake ground excitations to structures, has brought probabilistic performance-based design to the forefront of seismic design. In order to design structures that explicitly satisfy probabilistic performance criteria, a probabilistic performance-based optimum seismic design (PPBOSD) framework is proposed in this paper by extending the state-of-the-art performance-based earthquake engineering (PBEE) methodology. PBEE is traditionally used for risk evaluation of existing or newly designed structural systems, thus referred to herein as forward PBEE analysis. In contrast, its use for design purposes is limited… More >
Open Access
ARTICLE
Tingjin Liu1,2, Siyuan Zheng3, Xinwei Tang1,2,3,*, Yichao Gao4
CMES-Computer Modeling in Engineering & Sciences, Vol.120, No.3, pp. 545-560, 2019, DOI:10.32604/cmes.2019.05043
（This article belongs to this Special Issue: Advances in OpenSees Applications to Civil Engineering)
Abstract Based on the modified scale boundary finite element method and continued fraction solution, a high-order doubly asymptotic transmitting boundary (DATB) is derived and extended to the simulation of vector wave propagation in complex layered soils. The high-order DATB converges rapidly to the exact solution throughout the entire frequency range and its formulation is local in the time domain, possessing high accuracy and good efficiency. Combining with finite element method, a coupled model is constructed for time-domain analysis of underground station-layered soil interaction. The coupled model is divided into the near and far field by the truncated boundary, of which the… More >
Open Access
ARTICLE
Xinzheng Lu1,*, Yuan Tian2, Chujin Sun2, Shuhao Zhang2
CMES-Computer Modeling in Engineering & Sciences, Vol.120, No.3, pp. 561-582, 2019, DOI:10.32604/cmes.2019.04770
（This article belongs to this Special Issue: Advances in OpenSees Applications to Civil Engineering)
Abstract The open-source finite element software, OpenSees, is widely used in the earthquake engineering community. However, the shell elements and explicit algorithm in OpenSees still require further improvements. Therefore, in this work, a triangular shell element, NLDKGT, and an explicit algorithm are proposed and implemented in OpenSees. Specifically, based on the generalized conforming theory and the updated Lagrangian formulation, the proposed NLDKGT element is suitable for problems with complicated boundary conditions and strong nonlinearity. The accuracy and reliability of the NLDKGT element are validated through typical cases. Furthermore, by adopting the leapfrog integration method, an explicit algorithm in OpenSees and a… More >
Open Access
ARTICLE
Mohammed A. Mohammed1, Andre R. Barbosa1,*
CMES-Computer Modeling in Engineering & Sciences, Vol.120, No.3, pp. 583-627, 2019, DOI:10.32604/cmes.2019.06052
（This article belongs to this Special Issue: Advances in OpenSees Applications to Civil Engineering)
Abstract A three-dimensional nonlinear modeling strategy for simulating the seismic response of slender reinforced concrete structural walls with different cross-sectional shapes is presented in this paper. A combination of nonlinear multi-layer shell elements and displacement-based beam-column elements are used to model the unconfined and confined parts of the walls, respectively. A uniaxial material model for reinforcing steel bars that includes buckling and low-cyclic fatigue effects is used to model the longitudinal steel bars within the structural walls. The material model parameters related to the buckling length are defined based on an analytical expression for reinforcing steel bars embedded in reinforced concrete… More >
Open Access
ARTICLE
Zhijian Qiu1, Jinchi Lu1, Ahmed Elgamal1,*, Lei Su2, Ning Wang3, Abdullah Almutairi1
CMES-Computer Modeling in Engineering & Sciences, Vol.120, No.3, pp. 629-656, 2019, DOI:10.32604/cmes.2019.05759
（This article belongs to this Special Issue: Advances in OpenSees Applications to Civil Engineering)
Abstract The OpenSees computational platform has allowed unprecedented opportunities for conducting seismic nonlinear soil-structure interaction simulations. On the geotechnical side, capabilities such as coupled solid-fluid formulations and nonlinear incremental-plasticity approaches allow for representation of the involved dynamic/seismic responses. This paper presents recent research that facilitated such endeavors in terms of response of ground-foundation-structure systems using advanced material modeling techniques and high-performance computing resources. Representative numerical results are shown for large-scale soil-structure systems, and ground modification liquefaction countermeasures. In addition, graphical user interface enabling tools for routine usage of such 3D simulation environments are presented, as an important element in support of… More >
Open Access
ARTICLE
Filipe L. A. Ribeiro1,*, Andre R. Barbosa2, Luis C. Neves3
CMES-Computer Modeling in Engineering & Sciences, Vol.120, No.3, pp. 657-676, 2019, DOI:10.32604/cmes.2019.06296
（This article belongs to this Special Issue: Advances in OpenSees Applications to Civil Engineering)
Abstract Although pre-Northridge earthquake steel moment resisting frame buildings have been shown to be susceptible to brittle connection failures, they still represent a large fraction of the existing steel buildings in the United States of America. In this study, the performance of the 3- and 9-story Los Angeles pre-Northridge SAC buildings are analyzed considering ductile and brittle beam-column connection failures, and their uncertainty. This paper contributes to understanding the influence of uncertainty associated with connections brittle fracture on building interstory deformation capacity and its impact on bias and variability of fragility functions and loss assessment. The results show that considering brittle… More >
Open Access
ARTICLE
Mohammad Reza Salami1,*, Ebrahim Afsar Dizaj2, Mohammad Mehdi Kashani3
CMES-Computer Modeling in Engineering & Sciences, Vol.120, No.3, pp. 677-691, 2019, DOI:10.32604/cmes.2019.05666
（This article belongs to this Special Issue: Advances in OpenSees Applications to Civil Engineering)
Abstract The aim of this study is to investigate the dynamic performance of rectangular and circular reinforced concrete (RC) columns considering biaxial multiple excitations. For this purpose, an advanced nonlinear finite element model which can simulate various features of cyclic degradation in material and structural components is used. The implemented nonlinear fiber beam-column model accounts for inelastic buckling and low-cycle fatigue degradation of longitudinal reinforcement and can simulate multiple failure modes of RC columns under dynamic loading. Hypothetical rectangular and circular columns are used to investigate the failure modes of RC columns. A detailed ground motion selection is implemented to generate… More >
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