A New Buckling-Restrained Brace with a Variable Cross-Section Core

Li, Liang; Zhou, Tianhua; Chen, Junwu; Chen, Jianfeng

doi:10.1155/2019/4620430

Cited by 79 publications

(1 citation statement)

References 18 publications

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“…Buckling restrained braces (BRBs), which can provide lateral resistance as well as energy-dissipation capacity to the frameworks, have the functions of both the conventional steel brace and the metal energy dissipation damper [14][15][16][17][18][19]. Hector et al [20] performed a shaking table test on a reinforced concrete frame equipped with BRBs and found that the BRBs increased the damping of the structure and reduced the damage of the concrete frame.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Seismic Behavior of a Steel-Concrete Hybrid Structure with Buckling Restrained Braces

Zhou

2020

Advances in Civil Engineering

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e damage to a concrete wall caused by a strong earthquake is generally concentrated at the bottom of the concrete wall, which seriously threatens the safety of the steel-concrete hybrid structure and is very difficult to repair after an earthquake. In this paper, a steel-concrete hybrid structure with buckling restrained braces at a scale of 1/10 is constructed and tested on a shaking table. First, the mechanical properties of the BRBs are obtained through a static reciprocating loading test. en, the dynamic properties and seismic response of the steel-concrete hybrid structure with BRBs are obtained through shaking table tests. e results show that (1) the energy dissipation capacity of the BRBs is very good, and none of the BRBs buckle during the shaking table tests; (2) the steel beams and columns are basically in an elastic state; (3) all the cracks on the concrete wall are microcracks, which are widely distributed in floors 1-8 of the concrete walls; (4) the maximum interstory drift angle reaches 1/40, which indicates that the ductility of the steel-concrete hybrid structure is very good. In conclusion, BRBs can significantly improve the seismic performance of the steel-concrete hybrid structures.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Seismic Behavior of a Steel-Concrete Hybrid Structure with Buckling Restrained Braces

Zhou

2020

Advances in Civil Engineering

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The effects of key rock layer fracturing on gas extraction during coal mining over a large height

Xiao

Han

Shuang

et al. 2021

Energy Science & Engineering

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To prevent outbursts and extract the gas, it is necessary to investigate the structure of the key layer and the evolution of cracks during coal mining over a large height. A physical similarity model with a geometric similarity ratio of 1:100 and a strike length of 2 m was established on the basis of prevailing geological and mining conditions. Stress sensors and microseismic equipment were adopted to monitor the collapse characteristics of different key layers through variations in stress and energy. The research results showed that: The displacement of the overlying strata exhibited group motion characteristics marked by the key layer and there was zone of rapidly increasing stress in the goaf behind the working face before and after the fracture of the key layer. Through the analysis of microseismic events, fissure density, and fractal dimension, we found that: before and after the primary key layer fractured, the energy loss in the microseismic event accounted for 27% of the total, the fissure density also changed abruptly from 8 cracks/m to 10 cracks/m and the slope of the fractal dimension curves changed from 0.00243 to 9.94801 × 10−4. Then a gas drainage model suitable for this condition was constructed. When the primary key layer had not fractured, the cracks below fully developed to form a gas migration channel and a gas enrichment area, and gas boreholes could be arranged therein. After the primary key layer had been fractured, the rate of crack development decreased, the permeability would increase, and the gas concentration would increase. The boreholes could still be arranged in the gas migration channel. This study elucidated the control role of the primary key layer from multiple angles and provided experimental guidance for gas drainage over large‐mining heights and during complex key layer mining.

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Crack Detection on Brick Walls by Convolutional Neural Networks Using the Methods of Sub-dataset Generation and Matching

Talukder

Ota

Takanokura

et al. 2023

Communications in Computer and Information Science

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A New Buckling-Restrained Brace with a Variable Cross-Section Core

Cited by 79 publications

References 18 publications

Experimental Study on the Seismic Behavior of a Steel-Concrete Hybrid Structure with Buckling Restrained Braces

Experimental Study on the Seismic Behavior of a Steel-Concrete Hybrid Structure with Buckling Restrained Braces

The effects of key rock layer fracturing on gas extraction during coal mining over a large height

Crack Detection on Brick Walls by Convolutional Neural Networks Using the Methods of Sub-dataset Generation and Matching

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