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  • Open Access


    An Approach for Quantifying the Influence of Seepage Dissolution on Seismic Performance of Concrete Dams

    Shaowei Wang1,2, Cong Xu1, Hao Gu3,*, Pinghua Zhu1, Hui Liu1, Bo Xu4

    CMES-Computer Modeling in Engineering & Sciences, Vol.131, No.1, pp. 97-117, 2022, DOI:10.32604/cmes.2022.018721

    Abstract Many concrete dams seriously suffer from long-term seepage dissolution, and the induced mechanical property deterioration of concrete may significantly affect the structural performance, especially the seismic safety. An approach is presented in this paper to quantify the influence of seepage dissolution on seismic performance of concrete dams. To connect laboratory test with numerical simulation, dissolution tests are conducted for concrete specimens and using the cumulative relative leached calcium as an aging index, a deterioration model is established to predict the mechanical property of leached concrete in the first step. A coupled seepage-calcium dissolution-migration model containing two calculation modes is proposed… More >

  • Open Access


    Seismic Performance of Assembled Shear Wall with Defective Sleeve Connection

    Hua Yan1,2,3, Bo Song1,3,*, Dongsheng Xu2, Guodong Zhang2

    CMES-Computer Modeling in Engineering & Sciences, Vol.131, No.1, pp. 199-217, 2022, DOI:10.32604/cmes.2022.016312

    Abstract In this paper, three kinds of shear walls with full sleeve grouting, fully defective sleeve and partially defective are designed for finite element analysis to analyze the influence of defects on the seismic performance of shear walls. The research shows that at the beginning of loading (5 s), the three models begin to appear compressive damage at the bottom of the wall in all three models. The damage of the defect-free model develops rapidly, and the damage of the fully defective model is basically the same as that of the partially defective model. With the gradual increase of displacement control (15 s),… More >

  • Open Access


    Experimental and Numerical Assessment on Seismic Performance of Earth Adobe Walls

    Zele Li1, Mohammad Noori2, Wael A. Altabey1,3,*

    Structural Durability & Health Monitoring, Vol.15, No.2, pp. 103-123, 2021, DOI:10.32604/sdhm.2021.011193

    Abstract Earth buildings are common types of structures in most rural areas in all developing countries. Catastrophic failure and destruction of these structures under seismic loads always result in loss of human lives and economic losses. Wall is an important load-bearing component of raw soil buildings. In this paper, a novel approach is proposed to improve the strength and ductility of adobe walls. Three types of analyses, material properties, mechanical properties, and dynamic properties, are carried out for the seismic performance assessment of the adobe walls. These performed studies include that, material properties of the earth cylinder block, mechanical properties of… More >

  • Open Access


    Improving the Seismic Performance of Staircases in Building Structures with a Novel Isolator

    Yafei Zhang1,2, Ping Tan1,2,*, Haitao Ma1,2, Marco Donà1,2

    CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 415-431, 2020, DOI:10.32604/cmes.2020.09054

    Abstract A staircase provides the main escape way from a building in an emergency. Unfortunately, it may suffer severe damages or even collapse during an earthquake. For improving the seismic performance of staircases, this paper proposes an innovative staircase isolator with the features of lightweight, costeffective and ease of construction and replacement, which is formed by suitable engineering plastic shims between rubber layers. A connection construction scheme is also proposed for the isolated staircase. Systematic performance tests have been carried out to characterize the isolator in terms of mechanic behavior and ultimate states. The test results show that mechanical properties of… More >

  • Open Access


    Comparison between the Seismic Performance of Buried Pipes and Pipes in a Utility Tunnel

    Wei Liu1, 2, *, Qianxiang Wu2

    CMES-Computer Modeling in Engineering & Sciences, Vol.123, No.2, pp. 661-690, 2020, DOI:10.32604/cmes.2020.07764

    Abstract A utility tunnel system consists of pipes and ancillary facilities. In this paper, a finite element model of a concrete utility tunnel with pipes inside is established. Several tunnel segments were built to simulate a real utility tunnel, while the pipe was fixed by springs on the brackets in the utility tunnel. Using the discrete soil spring element to simulate the soil-structure interaction, actual earthquake records were adopted as excitation to analyze the seismic responses of pipes in a utility tunnel. Moreover, the influences of different parameters, including soil type, earthquake records, and field apparent wave velocity on the seismic… More >

  • Open Access


    A “Three-index” Seismic Performance Evaluation Method Based on Sino-US Seismic Code

    Hui Wang1,*, Shuqi Wan2

    Structural Durability & Health Monitoring, Vol.12, No.3, pp. 149-167, 2018, DOI: 10.3970/sdhm.2018.03928

    Abstract The Code for Seismic Design of Buildings (GB50011-2010) in 2016 and the method of seismic performance-based design for high-rise buildings in the Guide for Performance-based Design of High-Rise Buildings (TBI2017) are compared. In view of the characteristics and limitations of the seismic performance index set by the Sino-US seismic code, a “three-index” performance index system and evaluation process considering the displacement angle of the structural interlayer, the plastic damage degree of components and the plastic strain of material is put forward; combining the example of time-history analysis of a out-of-code high-rise building under the rare earthquakes is verified. The results… More >

  • Open Access


    Analysis of Office-Teaching Comprehensive Buildings Using a Modified Seismic Performance Evaluation Method

    Hanbo Zhu1,2, Changqing Miao1,2,*, Meiling Zhuang1,2

    CMES-Computer Modeling in Engineering & Sciences, Vol.118, No.3, pp. 471-491, 2019, DOI:10.31614/cmes.2019.04382

    Abstract Current building design codes allow the appearance of structural and nonstructural damage under design basis earthquakes. The research regarding probabilistic seismic loss estimation in domestic building structure is urgent. The evaluation in this paper is based on a 11-story reinforced concrete office building, incremental dynamic analysis (IDA) is conducted in Perform 3D program using models capable to simulate all possible limit states up to collapse. Next, the probability distribution of post-earthquake casualties, rebuild costs repair costs and business downtime loss are calculated in PACT software for the studied building considering the modified component vulnerability groups and population flow models. The… More >

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