学科分类
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4 个结果
  • 简介:EnvironmentallyExtendedInput-Output(EEIO)tableshavebecomeapowerfulelementinsupportinginformation-basedenvironmentalandeconomicpolicies.National-andprovincial-level10tablesarecurrentlypublishedbytheNationalBureauofStatisticsofthePeople’sRepublicofChinaaccordingtowell-definedconventions.However,county-level10tablesarenotprovidedasarulebyofficialstatisticsorganizations.ThispaperconductsanoverviewofcompilingEEIOtablesforenvironmentalandresourcesaccountingatthecountylevelandthenanswersseveralquestions:First,whatkindofdatashouldbepreparedforthecompilationofcounty-levelEEIOtables?Second,howcanwesetupcomprehensiveEEIOtablesatthecountylevel?Third,regardingthesurveymethodsandtheindirectmodeling,whichoneshouldbechosentobuildEEIOtablesatthecountylevel?Finally,whatpolicyquestionscouldsuchatableanswer?EEIOtablesatthecountylevelcanbeusedtopredicttheeconomicimpactsofenvironmentalpoliciesandtoperformtrendandscenarioanalysis.

  • 标签: county-level INPUT-OUTPUT TABLE ACCOUNTING influen
  • 简介:称为走的墙框架结构的一个新结构的系统在这研究被建议解决产出RC框架的问题的底部,它广泛地在中国发生在象Wenchuan和Yushu地震那样的以前的地震期间。平常的RC框架模型和一个走的墙框架建模的A1/5规模被使遭到一起摇桌子运动学习新结构的系统的地震行为。这份报纸在低、中等、高的紧张摇晃下面论述动态特征,地震回答和失败和二个模型的倒塌机制。测试结果和进一步的分析证明走的墙框架结构的地震表演以控制得好的变丑模式和更一致地分布式的损坏比平常的RC框架优异。走的墙能有效地压制产出机制的底部,并且为设计实践简单、节俭、实际。

  • 标签: 钢筋混凝土框架结构 对比试验 阶梯式 振动台 普通钢筋混凝土
  • 简介:Ashake-tableexperimentonpilefoundationsinliquefiablesoilscomposedofliquefiablesandandoverlyingsoftclayisstudied.Athree-dimensional(3D)effectivestressfiniteelement(FE)analysisisemployedtosimulatetheexperiment.Arecentlydevelopedmulti-surfaceelasto-plasticconstitutivemodelandafullycoupleddynamicinelasticFEformulation(u-p)areusedtomodeltheliquefactionbehaviorofthesand.Thesoildomainsarediscretizedusingasolid-fluidfullycoupled(u-p)20-8nodedbrickelement.Thepileissimulatedusingbeam-columnelements.Uponcarefulcalibration,verygoodagreementisobtainedbetweenthecomputedandthemeasureddynamicbehaviorofthegroundandthepile.Aparametricanalysisisalsoconductedonthemodeltoinvestigatetheeffectofpile-pinning,pilediameter,pilestiffness,groundinclinationangle,superstructuremassandpileheadrestraintsonthegroundimprovement.Itisfoundthatthepilefoundationhasanoticeablepinningeffectthatreducesthelateralsoildisplacement.Itisobservedthatalargerpilediameterandfixedpileheadrestraintscontributetodecreasingthelateralpiledeformation;however,ahighergroundinclinationangletendstoincreasethelateralpileheaddisplacementsandpilestiffness,andsuperstructuremassseemstoeffectivelyinfluencethelateralpiledisplacements.

  • 标签: LIQUEFACTION PILE PINNING soil improvement PILE