基于梁柱刚度比、柱梁强度比对框架结构破坏模式的影响分析

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1、重庆大学硕士学位论文侧向刚度、耗能能力增强效果不显著。④调整梁、柱抗弯线刚度比和柱、梁抗弯强度比对强震作用下框架结构的破坏模式均有控制作用：对于线刚度比大于1的框架结构，刚度比越小，梁柱损伤比越大，结构、局部楼层的损伤明显减轻，梁铰数量增多，柱铰数目减少且变形较小，破坏模式更合理；刚度比小于1的框架结构，虽然梁柱损伤比较大，但是顶层的柱铰数目较多、损伤程度较高，有形成层侧移机构的风险；提高强度比，减少了柱铰数目，明显减轻了柱铰变形，改善了结构整体和局部楼层的损伤程度，降低了梁柱损伤比，对框架结构破坏模式起到较好的控制作用。⑤根据有限算例的结果，

2、建议：框架结构设计时，应至少计入单侧8倍板厚宽度楼板的刚度及强度贡献，应将柱、梁实际抗弯强度比控制在1.1以上，宜将梁、柱线刚度比控制1~4的合理范围内；当梁、柱线刚度比小于1或大于4时，需将柱、梁实际抗弯强度比提高到1.3以上，才能保证强震作用下框架结构能够实现较为合理的“梁柱混合铰”破坏模式。关键词：框架结构，梁柱刚度比，强柱弱梁，损伤模型，破坏模式II英文摘要ABSTRACTTraditionally,throughtheadjustmentof"strongcolumnweakbeam"coefficient,RCframestruct

3、ureswereensuredtoformthereasonablefailuremodeinthequake,butignoredeffectsofreasonablematchingrelationshipbetweentheflexuralstiffnessandstrengthofbeamandcolumnonstructuralseismicperformanceandfailuremode.FocusingonRCframestructures,mainworkofthispaperisbrieflyasfollows:①Accor

4、dingtothecharacteristicsofplastichingeandthetraditionalevaluationsonfailuremode,thispaperidentifiedthequantitativedamageindicatorsfrommemberstostructures,putforwardthemethodforevaluatingfailuremodesofframestructureoverall,basedontherevisedPark-Angdoubledamageparameters’model

5、andthereasonableweightedcombinedmethod.②Thedifferencesofseismicperformanceandfailuremodesbetweentheacturalstructurewhichhasslabsandthedesignedstructurewithoutslabs,arecomparedthroughaccuratenonlinearanalysis.Itisobtainedtheequivalentmodelofeffectiveflangewidthvaluesoftheslab

6、sinthispaper,andtheeffectivenessoftheequivalentnumericalmodelisverified.③Toinvestigatetheinfluencesonseismicperformanceandfailuremodesfromtheflexuralstiffnessratioofbeamandcolumnortheflexuralstrengthratioofcolumnandbeam,anddeterminingthereasonablematchingrelationshipbetweent

7、heflexuralstiffnessandstrengthofbeamandcolumn,itisdesigned18equivalentnumericalplaneexamples(6kindsofflexuralstiffnessratio,3kindsofflexuralstrengthratio).Themainconclusionsareasfollows:①Thelateralstrengthandstiffnessofframestructurewithslabishigherthanstructurewithoutslab.B

8、utwiththeincreaseoflateraldisplacement,thenumberofcolumnhingesisincreased,t