Open Access
ARTICLE
Alan Alonso-Rivers1, Rolando Salgado-Estrada2,*
Structural Durability & Health Monitoring, Vol.14, No.3, pp. 187-204, 2020, DOI:10.32604/sdhm.2020.010743
Abstract A dynamic simulation method for cracked structures is implemented to
determine their dynamic response with the purpose of evaluating their structural
behavior. The procedure makes possible the simulation of three-dimensional
cracked structures. The excitation force is randomly generated to simulate wind
gusts. It is assumed the structure remains in the elastic range, which allows for
each mode that contributes to its dynamic response to be decoupled. The results
indicate that the presence of damage causes changes in the modals parameters of
the structure as accurate as other similar methods proposed for simpler structures.
Therefore, it is concluded that the proposed… More >
Open Access
ARTICLE
Rongfeng Chen1, Changqing Miao2,*
Structural Durability & Health Monitoring, Vol.14, No.3, pp. 205-228, 2020, DOI:10.32604/sdhm.2020.08997
Abstract In order to study the fatigue properties of rib-to-deck welded connection
and rib-to-rib welded connection in orthotropic steel bridge decks, a multi-scale
finite element model was set up to analyze the stress distribution characteristics
and the load test was conducted on the Taizhou Yangtze River Bridge. Comparing
the vehicle test results with the multi-scale finite element model results to verify the
accuracy of the finite element simulation for the stress response of two welded
details. The results indicated that: The stress at the rib-to-deck welded connection
and the rib-to-rib welded connection are the bending stress and the membrane
stress, respectively;… More >
Open Access
ARTICLE
Nan Guo1,*, Huajing Xiong1, Mingtao Wu1, Hongliang Zuo1, Fengguo Jiang2, Xiaofeng Hou3, Dabo Xin1
Structural Durability & Health Monitoring, Vol.14, No.3, pp. 229-248, 2020, DOI:10.32604/sdhm.2020.09104
Abstract Creep is an important characteristic of bamboo and wood materials
under long-term loading. This paper aims to study the long-term bending behaviour of prestressed glulam bamboo-wood beam (GBWB). For this, 14
pre-stressed GBWBs were selected and subjected to a long-term loading test
for 60 days. Then, a comparative analysis was performed for the effects of pretension values, the number of pre-stressed wires, and long-term load on the stress
variation of the steel wire and the long-term deflection of the beam midspan. The
test results showed that with the number of prestressed wires increasing, the total
stress of the steel wire… More >
Open Access
ARTICLE
Bo Liu1,*, Haoran Li1, Shuya Liu2
Structural Durability & Health Monitoring, Vol.14, No.3, pp. 249-264, 2020, DOI:10.32604/sdhm.2020.06482
Abstract The buoyancy of groundwater can reduce the foundation bearing capacity and cause the metro tunnels to float as a whole, which threatens the safety of
structures seriously. Therefore, uplift piles are set up to improve the structural stability. In this paper, FLAC3D software is used to establish the calculation models
of pile foundation. The bearing failure process of uplift piles was simulated to
study the influencing factors on single pile load bearing capacity as well as the
cooperative work laws of pile groups. The load-displacement curves of pile top
under different length-diameter ratios, pile-soil interface characteristics and pile
types are… More >
Open Access
ARTICLE
Hua Yan1,2,3,*, Bo Song1,3, Mansheng Wang4
Structural Durability & Health Monitoring, Vol.14, No.3, pp. 265-282, 2020, DOI:10.32604/sdhm.2020.06403
Abstract Analyze and compare the basic principles of ultrasonic detection of
voids in concrete, choose ZBL-U520/510 non-metallic ultrasonic detector, and
use the opposite detection method to test the void size in the joints of prefabricated concrete structures. The results show that: ultrasonic method by testing
the waveform, sound, and speed of sound analysis can effectively determine
the position of the defect, and through the conversion formula can estimate the
void size. Ultrasonic parameters are used to distinguish the internal defects of
Assembly concrete. Sometimes there are different results with different parameters. It is difficult for engineers to directly determine the internal… More >
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