结构工程师
結構工程師
결구공정사
STRUCTURAL ENGINEERS
2014年
4期
12-18
,共7页
王国弢%胡克旭%雷敏
王國弢%鬍剋旭%雷敏
왕국도%호극욱%뢰민
相对能量持时%阻尼调整系数%阻尼比
相對能量持時%阻尼調整繫數%阻尼比
상대능량지시%조니조정계수%조니비
significant duration%damping scaling factor%damping ratio
根据对408条地震地面运动记录的统计分析，首先研究了相对能量持时（D5-95）对位移谱阻尼调整系数（DSF）的影响。结果表明：D5-95对 DSF 的影响与周期（T）和阻尼比（ξ）有关；在长周期范围内，当ξ＜5％时，DSF 随着 D5-95的增长而增长；当ξ＞5％时，DSF 随着 D5-95的增长而减小；随着 T 的增长，D5-95对 DSF 的影响越显著；ξ越远离5％，D5-95对 DSF 的影响越显著；在短周期范围内，D5-95对 DSF无显著影响；DSF 相对于ξ存在异方差性。最后根据对只与周期和阻尼比有关的 DSF 回归方程的残差分析，提出了能反映 D5-95影响的 DSF 回归模型并给出了模型的回归系数。残差分析表明：该模型能体现长周期范围内 D5-95对 DSF 的影响。模型的标准差能体现 DSF 相对于ξ的异方差性。
根據對408條地震地麵運動記錄的統計分析，首先研究瞭相對能量持時（D5-95）對位移譜阻尼調整繫數（DSF）的影響。結果錶明：D5-95對 DSF 的影響與週期（T）和阻尼比（ξ）有關；在長週期範圍內，噹ξ＜5％時，DSF 隨著 D5-95的增長而增長；噹ξ＞5％時，DSF 隨著 D5-95的增長而減小；隨著 T 的增長，D5-95對 DSF 的影響越顯著；ξ越遠離5％，D5-95對 DSF 的影響越顯著；在短週期範圍內，D5-95對 DSF無顯著影響；DSF 相對于ξ存在異方差性。最後根據對隻與週期和阻尼比有關的 DSF 迴歸方程的殘差分析，提齣瞭能反映 D5-95影響的 DSF 迴歸模型併給齣瞭模型的迴歸繫數。殘差分析錶明：該模型能體現長週期範圍內 D5-95對 DSF 的影響。模型的標準差能體現 DSF 相對于ξ的異方差性。
근거대408조지진지면운동기록적통계분석，수선연구료상대능량지시（D5-95）대위이보조니조정계수（DSF）적영향。결과표명：D5-95대 DSF 적영향여주기（T）화조니비（ξ）유관；재장주기범위내，당ξ＜5％시，DSF 수착 D5-95적증장이증장；당ξ＞5％시，DSF 수착 D5-95적증장이감소；수착 T 적증장，D5-95대 DSF 적영향월현저；ξ월원리5％，D5-95대 DSF 적영향월현저；재단주기범위내，D5-95대 DSF무현저영향；DSF 상대우ξ존재이방차성。최후근거대지여주기화조니비유관적 DSF 회귀방정적잔차분석，제출료능반영 D5-95영향적 DSF 회귀모형병급출료모형적회귀계수。잔차분석표명：해모형능체현장주기범위내 D5-95대 DSF 적영향。모형적표준차능체현 DSF 상대우ξ적이방차성。
The influence of the earthquake significant duration (D5 -95 )on the damping scaling factor (DSF) was investigated by statistical analysis of 408 earthquake ground motion records.The study shows that the effect of the D5 -95 on the DSF depends on the vibration period (T)and the damping ratio (ξ).The DSF increases as the D5 -95 increases for long period situations if ξ<5%;but it decreases if ξ>5%.The impact of the D5 -95 is more significant as the T increases or ξdeviates from 5%.Almost no impact was observed for short period scenarios.The heteroscedasticity in the DSF distribution with respect to ξexists.Based on the analysis of DSF regression features that depend on T and ξ,a regression model that can reflect the influence of the D5 -95 on the DSF was proposed and the regression coefficients were tabulated.Studies show that the proposed model can reflect the influence of the D5 -95 on the DSF.The standard deviation of the model can re-flect heteroscedasticity characteristics of the DSF with respect to ξ.
