广西大学学报（自然科学版）
廣西大學學報（自然科學版）
엄서대학학보（자연과학판）
JOURNAL OF GUANGXI UNIVERSITY （NATURAL SCIENCE EDITION）
2014年
6期
1432-1440
,共9页
天然气管道悬索桥%地震%时程反应%单向激励%三向激励
天然氣管道懸索橋%地震%時程反應%單嚮激勵%三嚮激勵
천연기관도현색교%지진%시정반응%단향격려%삼향격려
cable-suspended bridge used for natural gas%seismic response%time-history analysis%single-support excitation%multiple-support excitation
为研究普光天然气管道悬索桥动力性能，完成了在天津波作用下的单向和三向一致激励地震时程反应计算。结果表明，在横向地震波激励下，普光天然气管道悬索桥的地震响应主要表现为桥身的横漂和桥塔的横桥向振动，顺桥向和竖向振动效应很小。在顺桥向地震波激励下，悬索桥的各个部位的位移和应力都明显比横桥向地震波激励下的位移小。在竖向地震波激励下，悬索桥的地震响应主要表现为桥身和桥塔的竖向振动，顺桥向和横桥向振动效应很小。对于桥身结构，横桥向的地震波所产生的震害最大，其次为竖向的地震波，顺桥向的地震波所产生的震害最小。对于主塔结构，顺桥向地震波激励下其位移时程曲线波动最大，但顺桥向地震波激励下的主塔应力时程曲线低于横桥向的地震波激励下的应力时程曲线。
為研究普光天然氣管道懸索橋動力性能，完成瞭在天津波作用下的單嚮和三嚮一緻激勵地震時程反應計算。結果錶明，在橫嚮地震波激勵下，普光天然氣管道懸索橋的地震響應主要錶現為橋身的橫漂和橋塔的橫橋嚮振動，順橋嚮和豎嚮振動效應很小。在順橋嚮地震波激勵下，懸索橋的各箇部位的位移和應力都明顯比橫橋嚮地震波激勵下的位移小。在豎嚮地震波激勵下，懸索橋的地震響應主要錶現為橋身和橋塔的豎嚮振動，順橋嚮和橫橋嚮振動效應很小。對于橋身結構，橫橋嚮的地震波所產生的震害最大，其次為豎嚮的地震波，順橋嚮的地震波所產生的震害最小。對于主塔結構，順橋嚮地震波激勵下其位移時程麯線波動最大，但順橋嚮地震波激勵下的主塔應力時程麯線低于橫橋嚮的地震波激勵下的應力時程麯線。
위연구보광천연기관도현색교동력성능，완성료재천진파작용하적단향화삼향일치격려지진시정반응계산。결과표명，재횡향지진파격려하，보광천연기관도현색교적지진향응주요표현위교신적횡표화교탑적횡교향진동，순교향화수향진동효응흔소。재순교향지진파격려하，현색교적각개부위적위이화응력도명현비횡교향지진파격려하적위이소。재수향지진파격려하，현색교적지진향응주요표현위교신화교탑적수향진동，순교향화횡교향진동효응흔소。대우교신결구，횡교향적지진파소산생적진해최대，기차위수향적지진파，순교향적지진파소산생적진해최소。대우주탑결구，순교향지진파격려하기위이시정곡선파동최대，단순교향지진파격려하적주탑응력시정곡선저우횡교향적지진파격려하적응력시정곡선。
Seismic time-history response of cable-suspended bridge used for natural gas pipelines under the single and multiple support excitations were calculated in order to research the dynamic property of the cable-suspended bridge. Under the crosswise seismic wave excitation, the main seis-mic response of cable-suspended bridge used for natural gas pipelines show crosswise drift of the bridge deck and crosswise vibration of the bridge tower, the vertical vibration and vibration effect a-long the bridge is insignificant. Under the seismic wave excitation along the bridge, the displacement and stress of parts of the cable-suspended bridge are significantly smaller than those of parts of the bridge under the crosswise seismic wave excitation. Under the vertical seismic wave excitation, the main seismic response of cable-suspended bridge shows the vertical vibration of the bridge and bridge tower, the crosswise and longitudinal bridge effect are insignificant. For bridge deck structure, the crosswise seismic wave cause the largest seismic damage, the vertical seismic wave follows, the seis-mic wave along the bridge cause the minimum seismic damage. For main bridge tower structure, the displacement time-history curve show the greatest volatility under the seismic wave excitation along the bridge, but the stress time-history curve is lower than the curve under the crosswise seismic wave excitation curve.
