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Self-centring segmental retaining walls—A new construction system for retaining walls

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 980-1000 doi: 10.1007/s11709-021-0737-5

Abstract: This paper reports on an experimental study on a new self-centring retaining wall system.Four post-tensioned segmental retaining walls (PSRWs) were experimentally tested.The results showed that such PSRWs are structurally adequate for water retaining structures.capacity of the wall.Results suggest that this newly developed self-centring retaining wall can be a suitable structural system

Keywords： retaining wall     segmental     precast concrete     unbonded post-tensioning     water retaining wall     seawall    

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Seismic analysis of semi-gravity RC cantilever retaining wall with TDA backfill

Il-Sang AHN, Lijuan CHENG

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4,   Pages 455-469 doi: 10.1007/s11709-017-0392-z

Abstract: The seismic behavior of Tire Derived Aggregate (TDA) used as backfill material of 6.10 m high retainingThe retaining walls were semi-gravity reinforced concrete cantilever type.under the Takatori earthquake, the TDA-backfill model developed substantially large displacement in the retaining

Keywords： TDA (Tire Derived Aggregate)     scrap tires     retaining wall     seismic analysis     Finite Element Analysis    

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Recent advances in geosynthetic-reinforced retaining walls for highway applications

Jie HAN, Yan JIANG, Chao XU

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 2,   Pages 239-247 doi: 10.1007/s11709-017-0424-8

Abstract: Geosynthetic-reinforced retaining (GRR) walls have been increasingly used to support roadways and bridgeIn addition, short geosynthetic layers have been used as secondary reinforcement in a GRR wall to forma hybrid GRR wall (HGRR wall) and reduce tension in primary reinforcement and facing deflections.This paper reviews recent studies on these new GRR wall systems, summarizes key results and findingsincluding but not limited to vertical and lateral earth pressures, wall facing deflections, and strains

Keywords： bridge     geosynthetic     highway     reinforced     wall    

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Multi-scale investigation of active failure for various modes of wall movement

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 961-979 doi: 10.1007/s11709-021-0738-4

Abstract: Retained backfill response to wall movement depends on factors that range from boundary conditions toHence, various modes of wall movement (translation and rotation) toward the active state are modeledpressure distribution and deformation mechanisms are discussed with reference to the associated modes of wall

Keywords： discrete-element modelling     granular materials     retaining walls     particle shape     arching    

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Nitrogen-retaining property of compost in an aerobic thermophilic composting reactor for the sanitary

Fan BAI, Xiaochang WANG,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 2,   Pages 228-234 doi: 10.1007/s11783-010-0022-7

Abstract: Aerobic composting is a method for the sanitary disposal of human feces as is used in bio-toilet systems. As the products of composting can be utilized as a fertilizer, it would be beneficial if the composting conditions could be more precisely controlled for the retention of fecal nitrogen as long as possible in the compost. In this study, batch experiments were conducted using a closed aerobic thermophilic composting reactor with sawdust as the bulk matrix to simulate the condition of a bio-toilet for the sanitary disposal of human feces. Attention was paid to the characteristics of nitrogen transformation. Under the controlled conditions of temperature at 60°C, moisture content at 60%, and a continuous air supply, more than 70% fecal organic removal was obtained, while merely 17% fecal nitrogen loss was observed over a two-week composting period. The nitrogen loss was found to occur mainly in the first 24 h with the rapid depletion of inorganic nitrogen but with an almost unchanged organic nitrogen content. The fecal NH–N which was the main component of the inorganic nitrogen (>90%) decreased rapidly in the first day, decreased at a slower rate over the following days, and finally disappeared entirely. The depletion of NH–N was accompanied by the accumulation of NH gas in the ammonia absorber connected to the reactor. A mass balance between the exhausted NH gas and the fecal NH–N content in the first 24 hours indicated that the conversion of ammonium into gaseous ammonia was the main reason for nitrogen loss. Thermophilic composting could be considered as a way to keep a high organic nitrogen content in the compost for better utilization as a fertilizer.

Keywords： nitrogen retention     composting reactor     human feces     aerobic     thermophilic     fertilizer    

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A Study on Project of Land-creation by Sand Retaining in Three Gorges Reservoir

Han Qiwei

Strategic Study of CAE 2003, Volume 5, Issue 5,   Pages 31-34

Abstract: A scheme of land creation by sand retaining and water sluicing has been proposed by the author.The principle of this proposal is to keep the water of Xiaojiang River to flow out, but retain the sedimentbranch reservoir.The original farmland will turn to be more rich and be preventable from drought and waterThe feasibility study supported by the Ministry of Water Resources is now carried out.

Keywords： inundated area     protection     water discharge and silt deposit     land reclamation    

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Numerical simulation of squat reinforced concrete wall strengthened by FRP composite material

Ali KEZMANE,Said BOUKAIS,Mohand Hamizi

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 4,   Pages 445-455 doi: 10.1007/s11709-016-0339-9

Abstract: The intent of this paper is to present a numerical simulation of squat reinforced concrete wall strengthened

Keywords： simulation     strengthening     reinforced concrete wall     squat wall     FRP composite material     damage     Abaqus    

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Nonlinear analysis of pre-tensioned glass wall facade by stability function with initial imperfection

Siu-Lai CHAN, Yaopeng LIU, Andy LEE,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3,   Pages 376-382 doi: 10.1007/s11709-010-0086-2

Abstract: Pre-tensioned high strength trusses using alloy steel bar are widely used as glass wall supporting systemsIt is not uncommon to see many similar glass wall systems fail in the wind load test chambers under a

Keywords： tension system     glass wall     nonlinear analysis     pre-tensioning     second-order analysis    

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Study on support mechanical behaviour and scheme for shallow buried tunnel in weak wall rock with richwater

Wan Fei,Tan Zhongsheng,Yang Sensen,Ma Dong

Strategic Study of CAE 2014, Volume 16, Issue 8,   Pages 45-53

Abstract: tunnel has done a series of research on support mechanical behaviour and scheme for tunnel in weak wallrock with rich water.Pressure of surrounding rock, stress in the steel frames, axial force of rock bolts and water pressureThe result indicates that primary support can't be effectively controlled, inrush of clay and waterFive meters grouted rock bolts, I20 steel frames and double layer mesh at arch wall consists of the primary

Keywords： Tunnel project     Shallow buried under river valley     Weak wall rock     Support scheme     Field monitoring    

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Diaphragm wall-soil-cap interaction in rectangular-closed- diaphragm-wall bridge foundations

Hua WEN, Qiangong CHENG, Fanchao MENG, Xiaodong CHEN

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1,   Pages 93-100 doi: 10.1007/s11709-009-0015-4

Abstract: Rectangular-closed-diaphragm-wall foundation is a new type of bridge foundation.Diaphragm wall-soil-cap interaction was studied using a model test.Due to the existence of cap, there is a “weakening effect” in inner shaft resistance of the upper wallsegments, and there is “enhancement effect” in the lower wall segments and in toe resistance.

Keywords： diaphragm wall     bridge foundation     low cap     interaction    

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Seismic response of precast reinforced concrete wall subjected to cyclic in-plane and constant out-of-plane

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1128-1143 doi: 10.1007/s11709-021-0753-5

Abstract: This paper provides insight into the seismic behavior of a full-scale precast reinforced concrete wallThe tested wall exhibited flexural cracks, owing to the high aspect ratio and considerable out-of-planeThe wall performed satisfactorily by exhibiting competent seismic parameters and deformation characteristicsto study the effect of backfill density and aspect ratio on seismic response of the proposed precast wall

Keywords： precast wall     basement wall     out-of-plane response     quasi-static test     sand backfill     seismic parameters    

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The behavior of a rectangular closed diaphragm wall when used as a bridge foundation

Qiangong CHENG, Jiujiang WU, Zhang SONG, Hua WEN

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 398-420 doi: 10.1007/s11709-012-0175-5

Abstract: The rectangular closed diaphragm (RCD) wall is a new type of bridge foundation.as well as the settlement, axial force and load-sharing ratio of a vertically loaded RCD wall.It was found that under lateral loading, the RCD wall behaves as an end-bearing friction wall duringpoint, and the horizontal displacement of the soil core is greater than that of the wall body.resistance of the wall body and is inversely proportional to the loading borne by the soil core.

Keywords： diaphragm wall     soil core     bridge foundation     FLAC3D     bearing behavior    

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Seismic behavior of cantilever wall embedded in dry and saturated sand

Sanku KONAI, Aniruddha SENGUPTA, Kousik DEB

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 690-705 doi: 10.1007/s11709-020-0615-6

Abstract: The embedded cantilever retaining walls are often required for excavation to construct the undergroundIn this paper, the behavior of a small scale model embedded cantilever retaining wall in dry and saturatedThe variation of the pore water pressures within the sand is also observed in the cases of saturatedThe maximum lateral displacement of a cantilever wall due to seismic loading is below 1% of the totalof the wall.

Keywords： embedded cantilever wall     shake table test     FLAC2D     seismic loading     saturated and dry sand    

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Environmental and human health impact assessment of major interior wall decorative materials

Bingqing ZHANG, Ruochen ZENG, Xiaodong LI

Frontiers of Engineering Management 2019, Volume 6, Issue 3,   Pages 406-415 doi: 10.1007/s42524-019-0025-4

Abstract: Despite the growing interest in green products in the interior wall decorative material market, knowledge, and territorial scope of various emissions are defined to facilitate comparison study of interior wallThe most impacted categories are global warming, respiratory effects, and water consumption.

Keywords： life cycle assessment     human health impact     integrated assessment     interior wall decorative material     green    

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Shear wall layout optimization of tall buildings using Quantum Charged System Search

Siamak TALATAHARI, Mahdi RABIEI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1131-1151 doi: 10.1007/s11709-020-0660-1

Abstract: This paper presents a developed meta-heuristic algorithm to optimize the shear walls of tall reinforced concrete buildings. These types of walls are considered as lateral resistant elements. In this paper, Quantum Charged System Search (QCSS) algorithm is presented as a new optimization method and used to improve the convergence capability of the original Charged System Search. The cost of tall building is taken as the objective function. Since the design of the lateral system plays a major role in the performance of the tall buildings, this paper proposes a unique computational technique that, unlike available works, focuses on structural efficiency or architectural design. This technique considers both structural and architectural requirements such as minimum structural costs, torsional effects, flexural and shear resistance, lateral deflection, openings and accessibility. The robustness of the new algorithm is demonstrated by comparing the outcomes of the QCSS with those of its standard algorithm.

Keywords： Quantum Charged System Search     shear wall     layout optimization     tall buildings    

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Title Author Date Type Operation

Self-centring segmental retaining walls—A new construction system for retaining walls

Journal Article

Seismic analysis of semi-gravity RC cantilever retaining wall with TDA backfill

Il-Sang AHN, Lijuan CHENG

Journal Article

Recent advances in geosynthetic-reinforced retaining walls for highway applications

Jie HAN, Yan JIANG, Chao XU

Journal Article

Multi-scale investigation of active failure for various modes of wall movement

Journal Article

Nitrogen-retaining property of compost in an aerobic thermophilic composting reactor for the sanitary

Fan BAI, Xiaochang WANG,

Journal Article

A Study on Project of Land-creation by Sand Retaining in Three Gorges Reservoir

Han Qiwei

Journal Article

Numerical simulation of squat reinforced concrete wall strengthened by FRP composite material

Ali KEZMANE,Said BOUKAIS,Mohand Hamizi

Journal Article

Nonlinear analysis of pre-tensioned glass wall facade by stability function with initial imperfection

Siu-Lai CHAN, Yaopeng LIU, Andy LEE,

Journal Article

Study on support mechanical behaviour and scheme for shallow buried tunnel in weak wall rock with richwater

Wan Fei,Tan Zhongsheng,Yang Sensen,Ma Dong

Journal Article

Diaphragm wall-soil-cap interaction in rectangular-closed- diaphragm-wall bridge foundations

Hua WEN, Qiangong CHENG, Fanchao MENG, Xiaodong CHEN

Journal Article

Seismic response of precast reinforced concrete wall subjected to cyclic in-plane and constant out-of-plane

Journal Article

The behavior of a rectangular closed diaphragm wall when used as a bridge foundation

Qiangong CHENG, Jiujiang WU, Zhang SONG, Hua WEN

Journal Article

Seismic behavior of cantilever wall embedded in dry and saturated sand

Sanku KONAI, Aniruddha SENGUPTA, Kousik DEB

Journal Article

Environmental and human health impact assessment of major interior wall decorative materials

Bingqing ZHANG, Ruochen ZENG, Xiaodong LI

Journal Article

Shear wall layout optimization of tall buildings using Quantum Charged System Search

Siamak TALATAHARI, Mahdi RABIEI

Journal Article