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On subsurface box-shaped lined tunnel under incident SH-wave propagation

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4, Pages 948-960 doi: 10.1007/s11709-021-0740-x

Abstract: time-domain boundary element method is applied to obtain the seismic ground response, including a subsurface box-shapedlined tunnel deployed in a linear homogenous elastic medium exposed to obliquely incident SH-waves.Only the boundary around the tunnel is required to be discretized.The present approach can be proposed to civil engineers for preparing simple underground box-shaped models

Keywords： box-lined tunnel half-plane BEM surface response SH-wave time-domain

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Cohesive zone model-based analyses of localized leakage of segmentally lined tunnels

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4, Pages 503-521 doi: 10.1007/s11709-023-0927-4

Abstract: This paper presents a novel approach for simulating the localized leakage behavior of segmentally linedIt is first verified via a tunnel drainage experiment, which reveals its merits over the existing localholes on the leakage behavior, stratum seepage field, and leakage-induced mechanical response of the tunnel

Keywords： segmentally lined tunnel localized leakage cohesive element hydraulic behavior numerical modeling

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Key Technologies of the Hydraulic Structures of the Three Gorges Project

Xinqiang Niu

Engineering 2016, Volume 2, Issue 3, Pages 340-349 doi: 10.1016/J.ENG.2016.03.006

Abstract:

To date, the Three Gorges Project is the largest hydro junction in the world. It is the key project for the integrated water resource management and development of the Changjiang River. The technology of the project, with its huge scale and comprehensive benefits, is extremely complicated, and the design difficulty is greater than that of any other hydro project in the world. A series of new design theories and methods have been proposed and applied in the design and research process. Many key technological problems regarding hydraulic structures have been overcome, such as a gravity dam with multi-layer large discharge orifices, a hydropower station of giant generating units, and a giant continual multi-step ship lock with a high water head.

Keywords： Three Gorges Project Large orifice gravity dam Penstock on dam downstream surface Tailrace tunnel withsloping ceiling Stable arch Fully lined ship lock

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Effect of inlet box on performance of axial flow fans

LI Jingyin, TIAN Hua, YUAN Xiaofang

Frontiers in Energy 2008, Volume 2, Issue 4, Pages 390-394 doi: 10.1007/s11708-008-0087-1

Abstract: Numerical investigations on 3D flow fields in an axial flow fan with and without an inlet box have beenfan performance caused by the internal flow fields and the velocity evenness at the exit of the inlet boxIt is interesting to find that although the inlet box is well designed in accordance with basic designThis research shows that the inlet box needs further improvement and such a check on the flow fields

Keywords： box velocity distribution accordance Numerical variation

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Safety assessment for buried drainage box culvert under influence of underground connected aisle blasting

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 2, Pages 191-204 doi: 10.1007/s11709-022-0906-1

Abstract: complex urban environments is considered to influence the safety and stability of the overlying drainage boxThe vibration response evolution law of the buried drainage box culvert under blasting vibration wasThe results reveal that the maximum tensile stress of the box culvert structure was 0.33 MPa.as the water level in the box culvert increased.Based on the relationship between the tensile stress of the box culvert, PPV of the box culvert, and

Keywords： drainage box culvert underpass blasting dynamic response numerical simulation safety assessment

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Experimental monitoring of the strengthening construction of a segmental box girder bridge and field

Ali Fadhil NASER, Zonglin WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3, Pages 308-320 doi: 10.1007/s11709-012-0140-3

Abstract: Prestressed concrete segmental box girder bridges are composed of short concrete segments that are eitherdeformation of the steel deviation cross beam during the tension process; measuring the deformation of the box

Keywords： prestressed concrete box girder monitoring external tendons strain deflection

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Experimental study on concrete box culverts in trenches

Baoguo CHEN, Junjie ZHENG, Jie HAN

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1, Pages 73-80 doi: 10.1007/s11709-009-0008-3

Abstract: Concrete box culverts are widely used in expressways in mountain areas.

Keywords： culvert vertical earth pressure soil arch full-scale experiment numerical simulation

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Temperature variation of concrete box girder bridge

Jian WANG, Zhi FANG,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4, Pages 407-413 doi: 10.1007/s11709-009-0053-y

Abstract: theoretical analysis and measurement on site, the temperature gradients and its variation on concrete boxthe heat transfer theory and finite element method (FEM), the heat flux of the surface of concrete boxLast, some conclusions were obtained, which could provide the basis for box girder design under solar

Keywords： temperature transfer correlation radiation variation

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Trial design of arch bridge of composite box section with steel web-concrete flange

Jiangang WEI, Qingwei HUANG, Baochun CHEN,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3, Pages 370-375 doi: 10.1007/s11709-010-0073-7

Abstract: A potential solution is to use a composite box arch ring with steel web-concrete flange.arch bridge in the world with a main span of 420 m) as a prototype, trial designs of a composite box

Keywords： steel webs concrete box arch trial design structural behaviors finite element method

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Research of steel box girder dehumidification in Taizhou Bridge

Li Lin and Xu Jun

Strategic Study of CAE 2012, Volume 14, Issue 5, Pages 10-13

Abstract:

The steel box girder of Taizhou Bridge is 2 160 m long with volume ofThe paper analyzes the principle, lectotype, setting, workflow and construction of the steel box girderAnd the paper protocols the quality inspection and evaluation standards of the steel box girder dehumidification

Keywords： Taizhou Bridge steel box girder dehumidification research

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The Application of Box Floor as Submerged Camel to Hydraulic Btructures Being Constructed

Zhou Junliang

Strategic Study of CAE 2000, Volume 2, Issue 11, Pages 78-83

Abstract:

In this paper, the application of box floor as submerged camel to hydraulics structures being constructed

Keywords： constructing hydraulic structures the box floor as submerged camel derwater construction

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Field test on temperature field and thermal stress for prestressed concrete box-girder bridge

Baoguo CHEN, Rui DING, Junjie ZHENG, Shibiao ZHANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2, Pages 158-164 doi: 10.1007/s11709-009-0002-9

Abstract: distribution of temperature field and the variation of thermal stress for a prestressed concrete (PC) box-girderfield tests, the thermal stress incurred by hydration heat may induce temperature cracks on the PC box-girderThe conclusions can provide valuable reference for the design and construction of PC box-girder bridges

Keywords： box-girder bridge field test hydration heat temperature field temperature gradient thermal stress

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A Simplified Nonlinear Model of Vertical Vortex-Induced Force on Box Decks for Predicting Stable Amplitudes

Le-Dong Zhu, Xiao-Liang Meng, Lin-Qing Du, Ming-Chang Ding

Engineering 2017, Volume 3, Issue 6, Pages 854-862 doi: 10.1016/j.eng.2017.06.001

Abstract:

Wind-tunnel tests of a large-scale sectional model with synchronous measurements of force and vibrationout to investigate the nonlinear behaviors of vertical vortex-induced forces (VIFs) on three typical boxdecks (i.e., fully closed box, centrally slotted box, and semi-closed box).On these bases, a universal simplified nonlinear mathematical model of the vertical VIF on box decks

Keywords： Box deck of bridge Vertical vortex-induced vibration Vertical vortex-induced force Simplified nonlinearmodel Wind-tunnel test Large-scale sectional model Synchronous measurement of force and vibration

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Fatigue stress monitoring and analyses for steel box girder of Runyang Suspension Bridge

WANG Ying, LI Zhaoxia, WU Baijian

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 3, Pages 197-204 doi: 10.1007/s11709-008-0038-2

Abstract: The fatigue stress spectrums of steel box girders under normal traffic load, heavy trucks and typhoon

Keywords： bridge monitoring location RYSB traffic loading information

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Research on Demarcating Method for Deep Tunnel and Shallow Tunnel in Soil

Zhao Zhanchang,Xie Yongli

Strategic Study of CAE 2005, Volume 7, Issue 10, Pages 84-86

Abstract:

Directed against the demarcating problems of deep tunnel and shallow tunnel in exiting methods, thefeasible by two engineering cases, and is of importantce to lining design and construction of soil tunnel

Keywords： soil tunnel deep tunnel and shallow tunnel demarcating method