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Development of a seismic design method based on response spectra for building structures

ZHOU Xiyuan, YU Ruifang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2,   Pages 129-141 doi: 10.1007/s11709-007-0014-2

Abstract: mode superposition method (in real form) for the non-classically damped linear system and the general calculationformula for the application of code; 2) the complex complete quadratic combination (CCQC) method formulti-components and multiple-support seismic excitations and deducing corresponding method; 4) the approach for calculationof seismic response of the non-classically damped system with overcritical damping and the calculationuncoupling method; 7) bringing forward the concept of partial quadratic combination in order to reduce the calculation

Keywords： generalization     classical damping     mode-superposition response     calculation formula     damping theory    

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Discussion on formula for anti pull bearing capacity of DX pile

Yuan Xiyu,He Dexin,Chen Lihong

Strategic Study of CAE 2012, Volume 14, Issue 1,   Pages 69-73

Abstract: DX-pile and compares it with the measured value on the basis of a project to discuss and study these calculationmethods, and a new method of calculation is also proposed.

Keywords： DX-pile     uplift capacity     resistance of load carrying plate     calculation methods    

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Explicit finite element method for calculation and analysis to the elasto-plastic dynamic response of

LI Liang, DU Xiuli, LI Liyun, ZHAO Chenggang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 4,   Pages 436-442 doi: 10.1007/s11709-007-0059-2

Abstract: Then, the space discretization of these equations is performed to get their Galerkin formula.At last, the time discretization of this formula is carried out with the integral method which consistsdifference method and Newmark constant average acceleration method to get the explicit time integral formulaOn the basis of the integral formula mentioned above, the time-domain explicit finite element methodis developed for calculation and analysis of the elasto-plastic dynamic response of fluid-saturated porous

Keywords： discretization     computational     calculation     integral     requirement    

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Experimental Demonstrations and Analysis for Continuous Rolling Tension Formula

Zhang Jinzhi,Zhao Houxin,Wang Zhe,Wang Baoluo

Strategic Study of CAE 2008, Volume 10, Issue 4,   Pages 73-77

Abstract:

The continuous rolling tension formula is the core of the theory andIn 1960s, the author introduced continuous rolling differential formula, the dynamic tension formulafor multi-stands and the stable state tension formula.All these formuls have been discussed in detail.The Japanese derived the tension formula in theory inHerein, the tension formula is demonstrated by employing the data of the experimental results made by

Keywords： tension formula     experimental demonstrations     analytic root     deterministic    

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Application of an efficient stochastic calculation method on the seismic analysis of an isolated structure

Wei GUO, Zhiwu YU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 379-384 doi: 10.1007/s11709-012-0180-8

Abstract: However, traditional seismic calculation theory and methods are derived based on the assumption thatBased on this drawback, a new, more efficient stochastic calculation method, an improvement on the pseudo-excitationMoreover, the calculation process of the seismic response of an isolated structure is convergent.

Keywords： isolated structure     stochastic response     non-proportional damping     efficient     accurate     pseudo-excitation method    

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The Method and Formula for Stability Factor of Slope with State of Soil Original Stress

Wang Guoti

Strategic Study of CAE 2006, Volume 8, Issue 12,   Pages 80-84

Abstract: In this paper, in consideration of the state of soil original stress, the calculating formula for safetyThere are many examples of safety factor using the formula of this paper, which have been calculatedThe formula have showed their clear concept, simple calculation and dependable result.

Keywords： ateral stress coefficient K0     state of original stress     formula of safety factor of stability    

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The calculation of equivalence factor for ecological footprints in China: a methodological note

Moucheng LIU,Wenhua LI,Dan ZAHNG,Ning SU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 6,   Pages 1015-1024 doi: 10.1007/s11783-014-0670-0

Abstract: The Ecological Footprint (EF), a physical indicator to measure the extent of humanity’s use of natural resources, has gained much attention since it was first used by Wackernagel and Rees in 1996. In order to appraise land area types with different levels of productivity, they introduced the concept of an equivalence factor. This relates to the average primary biomass productivities of different types of land (i.e. arable land, pasture, forest, water/fishery, built-up land and fossil energy land) to the regional average primary biomass productivity of all land types in a given year. Hence, the equivalence factor is an important parameter in the EF model and it directly affects the reliability of all results. Thus, this article calculates equivalence factors on the national and provincial levels in China based on Net Primary Production (NPP) from MODIS 1 km data in 2008. Firstly, based on the Light Utility Efficiency and CASA model, the NPP of different biologically productive lands of China and of different provinces was calculated. Secondly, China’s equivalence factor for 6 land area types was calculated based on NPP: arable land and built-up land has an equivalence factor of 1.71, forest and fossil energy land has a factor of 1.41, pasture has a factor of 0.44 and water/fishery 0.35; Finally, the equivalence factor of 6 land area types in different provinces was also calculated. The NPP of each ecosystem type varies along with the equivalence factor in different provinces. However, the ranking of the equivalence factors in different provinces remain the same, with that of arable land being the largest, and the water/fishery being the smallest.

Keywords： ecological footprint     equivalence factor     net primary production     biological capacity     land types    

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Unified calculation method and its application in determining the uniaxial mechanical properties of concrete

Faxing DING, Xiaoyong YING, Linchao ZHOU, Zhiwu YU

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 381-393 doi: 10.1007/s11709-011-0118-6

Abstract: This paper presents a unified calculation method and its application in determining the uniaxial mechanicalhigh-strength and super high-strength concrete in China and performing a regression analysis, unified calculation

Keywords： concrete     mechanical properties     stress-strain relationship     uniaxial stress     application    

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Lingguizhugan Decoction, a Chinese herbal formula, improves insulin resistance in overweight/obese subjects

Frontiers of Medicine 2022, Volume 16, Issue 5,   Pages 745-759 doi: 10.1007/s11684-021-0880-3

Abstract: Lingguizhugan Decoction (LGZG) has been investigated in basic studies, with satisfactory effects on insulin resistance in non-alcoholic fatty liver disease (NAFLD). This translational approach aimed to explore the effect and underlying mechanism of LGZG in clinical setting. A randomized, double-blinded, placebo-controlled trial was performed. A total of 243 eligible participants with NAFLD were equally allocated to receive LGZG (two groups: standard dose and low dose) or placebo for 12 weeks on the basis of lifestyle modifications. The primary efficacy variable was homeostasis model assessment of insulin resistance (HOMA-IR). Analyses were performed in two populations in accordance with body mass index (BMI; overweight/obese, BMI ≥ 24 kg/m2; lean, BMI < 24 kg/m 2). For overweight/obese participants, low-dose LGZG significantly decreased their HOMA-IR level compared with placebo (−0.19 (1.47) versus 0.08 (1.99),P = 0.038). For lean subjects, neither dose of LGZG showed a superior effect compared with placebo. Methylated DNA immunoprecipitation sequencing and real-time qPCR found that the DNA N6-methyladenine modification levels of protein phosphatase 1 regulatory subunit 3A (PPP1R3A) and autophagy related 3 (ATG3) significantly increased after LGZG intervention in overweight/obese population. Low-dose LGZG effectively improved insulin resistance in overweight/obese subjects with NAFLD. The underlying mechanism may be related to the regulation of DNA N6-methyladenine modification of PPP1R3A and ATG3. Lean subjects may not be a targeted population for LGZG.

Keywords： insulin resistance     non-alcoholic fatty liver disease     Chinese herbal medicine     randomized controlled trial     DNA N6-methyladenine modification    

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Iteration framework for solving mixed lubrication computation problems

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3,   Pages 635-648 doi: 10.1007/s11465-021-0632-8

Abstract: A discretization formula of the Reynolds equation, which is based on the Crank–Nicolson method, is proposed

Keywords： mixed lubrication     discretization formula     relative error     Reynolds equation     asperity    

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Calculation method of load distribution on pipe threaded connections under tension load

Shoujun CHEN, Lianxin GAO, Qi AN

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 241-248 doi: 10.1007/s11465-011-0219-x

Abstract:

This paper presents a new calculation method that can calculate the load distribution on pipe threaded

Keywords： load distribution     calculation method     pipe threaded connections     tension load    

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A prediction formula of water temperature released from the multi-level stop-log gate intake of hydropower

Gao Xueping,Chen Hong,Song Huifang

Strategic Study of CAE 2011, Volume 13, Issue 12,   Pages 63-67

Abstract: And a simple and practical formula of water temperature released is need.A prediction formula of water temperature released is put forward based on the experimental data.The formula is validated by the experimental results of water temperature released from the intakes of

Keywords： thermally stratified reservoir     hydropower station intake     stop-log gate     formula of water temperature    

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Calculation on phase diagrams of polyetherimide/

Ming TAN,Gaohong HE,Yan DAI,Rujie WANG,Wenhua SHI

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 3,   Pages 312-319 doi: 10.1007/s11705-014-1434-x

Abstract: The ternary phase diagrams of polyetherimide (PEI)/ , -dimethylacetamide (DMAc) with H O and BuOH as non-solvent were simulated using solubility parameter and Flory-Huggins theory. The phase diagrams show that 5.5% H O/BuOH system containing 5% BuOH and 0.5% H O, or 6.5% H O/BuOH system containing 6.2% BuOH and 0.3% H O is required to induce liquid-liquid demixing for 20 wt-% PEI/DMAc casting solution. Therefore, BuOH can enhance the phase separation of the PEI casting solution and hereby induce higher porosity of the membrane, and the diffusion of BuOH into the water coagulation bath causes larger pore size easily compared with DMAc. Our predictions that the membrane pure water flux first increases then decreases, and the rejection ratio of bovine serum albumin decreases with the increasing concentration of BuOH were validated by the experiments using the prepared membranes.

Keywords： phase diagram     solubility parameter     interaction parameter     ultrafiltration     Flory-Huggins theory    

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Heuristic solution using decision tree model for enhanced XML schema matching of bridge structural calculation

Sang I. PARK, Sang-Ho LEE

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1403-1417 doi: 10.1007/s11709-020-0666-8

Abstract: Research on the quality of data in a structural calculation document (SCD) is lacking, although the SCDThe inverse-calculation method was applied to extract the weight factors from the decision tree model

Keywords： structural calculation document     bridge structure     XML Schema matching     weight factor     data mining     decision    

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Recovery of NH

Yang ZHANG,Zifu LI,Ibrahim B MAHMOOD

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 6,   Pages 825-834 doi: 10.1007/s11783-014-0682-9

Abstract: ion, a main pollutant in aquatic systems, not only causes eutrophication in rivers and lakes but also contributes to fish toxicity. In this study, an eco-friendly biosorbent was prepared from the pyrolysis of corn cob, a low-cost agricultural residue. The biochars produced by pyrolysis of corn cob at 400°C and 600°C were characterized and investigated as adsorbents for from an aqueous solution. The biochars were characterized through elemental analysis, Brunauer–Emmett–Teller–N surface area analysis, scanning electron microscopy, and Fourier transform infrared spectroscopy. Batch experiments were conducted to investigate the adsorption process of the corn cob biochars. The Freundlich isotherm model fitted the adsorption process better than the Langmuir and Dubinin–Radushkevich isotherm models. Moreover, the adsorption process was well described by a pseudo-second-order kinetic model. Results of thermodynamic analysis suggested that adsorption was a nonspontaneous exothermic process. Biochars produced at 400°C had higher adsorption capacity than those produced at 600°C because of the presence of polar functional groups with higher acidity. The exhausted biochar can be potentially used as soil conditioner, which can provide 6.37 kg (N fertilizer per ton of biochar).

Keywords： corn cob     biochar     isotherm model     kinetic model     formula>   

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Title Author Date Type Operation

Development of a seismic design method based on response spectra for building structures

ZHOU Xiyuan, YU Ruifang

Journal Article

Discussion on formula for anti pull bearing capacity of DX pile

Yuan Xiyu,He Dexin,Chen Lihong

Journal Article

Explicit finite element method for calculation and analysis to the elasto-plastic dynamic response of

LI Liang, DU Xiuli, LI Liyun, ZHAO Chenggang

Journal Article

Experimental Demonstrations and Analysis for Continuous Rolling Tension Formula

Zhang Jinzhi,Zhao Houxin,Wang Zhe,Wang Baoluo

Journal Article

Application of an efficient stochastic calculation method on the seismic analysis of an isolated structure

Wei GUO, Zhiwu YU

Journal Article

The Method and Formula for Stability Factor of Slope with State of Soil Original Stress

Wang Guoti

Journal Article

The calculation of equivalence factor for ecological footprints in China: a methodological note

Moucheng LIU,Wenhua LI,Dan ZAHNG,Ning SU

Journal Article

Unified calculation method and its application in determining the uniaxial mechanical properties of concrete

Faxing DING, Xiaoyong YING, Linchao ZHOU, Zhiwu YU

Journal Article

Lingguizhugan Decoction, a Chinese herbal formula, improves insulin resistance in overweight/obese subjects

Journal Article

Iteration framework for solving mixed lubrication computation problems

Journal Article

Calculation method of load distribution on pipe threaded connections under tension load

Shoujun CHEN, Lianxin GAO, Qi AN

Journal Article

A prediction formula of water temperature released from the multi-level stop-log gate intake of hydropower

Gao Xueping,Chen Hong,Song Huifang

Journal Article

Calculation on phase diagrams of polyetherimide/

Ming TAN,Gaohong HE,Yan DAI,Rujie WANG,Wenhua SHI

Journal Article

Heuristic solution using decision tree model for enhanced XML schema matching of bridge structural calculation

Sang I. PARK, Sang-Ho LEE

Journal Article

Recovery of NH

Yang ZHANG,Zifu LI,Ibrahim B MAHMOOD

Journal Article