英文隔震结构的

第四章隔震结构的分析令第一节正交阻尼结构11.1EquationsofMotionss2MassRatiosNominalFrequenciesAssume1.2DefinitionsofSeveralFactorsNominalDampingRatiosbands

31.3ModalAnalysisCharacteristicEquationfortheFrequenciesFreeVibrationEquationsofUndampedSystem4SolutionsofCharacteristicEquationModeShapesApproximationtofirstorderin5ModeCoordinatesqpremultiplyingbyTModalEquationswhereModalLoadFactor(振型参与因子)Li

isgivenby6UncoupledModalEquationsandmodaldampingratioi

iscomputedfrom7MaximumDisplacementsApproximationtofirstorderin81.4BaseShearCoefficientofSuperstructure9第二节非正交阻尼结构2.1Significanceofoff-diagonaldampingterms10112.2Ignoringoneofoff-diagonaldampingtermsModalLoadFactorResultingEquation12132.芦3瞎In坑te搞rs勿to棉ry钩D岔ri类ft14(i净)尝th代at挂c籍on琴tr槽ib抓ut治ed慢b氏y惩th输e相un抛co训up头le鱼d巨fi摄rs屿t向mo彻de(i求i)形t其ha挎t偶fr架om渐t睡he里u买nc数ou怠pl茅ed返s胜ec荷on顺d朗mo洋deTh杰re殊e锻It袄em捐s15(i慌ii动)血th次at臭f遮ro肠m急th嘉e档co鼻up惨le段d棍te旷rmRe谦la球ti芝on扫w洞it搜h研Re废sp似on未se仔S辫pe赶ct驼ru钱m1617I3SVI4SV18Co报ns致ta方nt诉V喊el轿oc帅it持y命Sp缴ec瞧tr饭a注意遥：H()修长正与我国坟规范弹的差汗异例如致，H()可液取19Ig或no好re2an龄d自i肯n领th掀e种3rdte塘rm20Ka猛wa飘sh糕im塑a-达Ai盲za党wa缠F毕un炸ct级io皮nR=稻0.归33誉w跟he抖nb=0.正1R=湿1.雀80球w榨he暗nb=0.辞5Ex协am所pl毛e212.馆3狭Fl壶oo趋r盒Ac衬ce晒le扣ra肝ti江on22算例已知溪：隔耍震结偷构重剧量为锋W，咸周期僻为2削.5耗s，迁阻尼两比5鸡％，=权1/岭25并，汇=1穷/2。按垒规范绞算得捷的隔凭震层景位移资为7数6c赢m，逆为减抄小位今移在班隔震采层设倡置粘烂滞阻货尼器数，其稿阻尼赶比为玻50暂％。六求增设籍粘滞逗阻尼虹器后异的隔震呼层位所移、基底啄剪力和屋而面加滤速度情。解：(1墙)隔赠震层侨位移罪为23最大脸位移冲时的羡底部刊剪力狮为阻尼琴力最大牌剪力伪速繁度谱辽值按p对22费页公意式计图算楼朴面加醒速度晌，结台果如扇下：基底锹剪力屋面洁加速卷度2425参考锁文献1.笔N棉ae予im翻F楼a穗nd税K炉el遗ly房诚J狐M,治“睁De耻si走gn便o滚f讽se避is砌mi叮c薯is棍ol壳at老ed矛s叠tr岔uc涌tu盐re致s”碎J