公路交通技术
公路交通技術
공로교통기술
TECHNOLOGY OF HIGHWAY AND TRANSPORT
2015年
1期
51-57
,共7页
简支梁桥%抗震设计%桥梁震害%震损过程分析%支座损伤
簡支樑橋%抗震設計%橋樑震害%震損過程分析%支座損傷
간지량교%항진설계%교량진해%진손과정분석%지좌손상
simply supported beam bridge%seismic design%earthquake damage to bridge%analysis for process of earthquake damage%bearing damage
我国公路简支梁桥的使用量大面广，其抗震安全性对确保震后交通网络的畅通具有重要意义。采用统计分析和数值模拟等方法，对“5·12”汶川地震中958座简支梁桥的6594组支座、2136个桥墩的震害表现和简支梁桥震损过程进行分析，结果表明：对于位于烈度Ⅷ度及以上地区的桥梁，板式橡胶支座的震害难以避免，但支座破坏对桥墩具有保护作用。提出基于支座有限损伤的简支梁桥抗震设计思想和理论框架，容许支座出现有限损伤来保护桥墩。通过提出合理的支座性能目标、预测桥梁的地震响应和采取相应的限位措施来控制支座损伤。通过大量的计算分析提出B类桥梁的支座容许损伤定量指标。
我國公路簡支樑橋的使用量大麵廣，其抗震安全性對確保震後交通網絡的暢通具有重要意義。採用統計分析和數值模擬等方法，對“5·12”汶川地震中958座簡支樑橋的6594組支座、2136箇橋墩的震害錶現和簡支樑橋震損過程進行分析，結果錶明：對于位于烈度Ⅷ度及以上地區的橋樑，闆式橡膠支座的震害難以避免，但支座破壞對橋墩具有保護作用。提齣基于支座有限損傷的簡支樑橋抗震設計思想和理論框架，容許支座齣現有限損傷來保護橋墩。通過提齣閤理的支座性能目標、預測橋樑的地震響應和採取相應的限位措施來控製支座損傷。通過大量的計算分析提齣B類橋樑的支座容許損傷定量指標。
아국공로간지량교적사용량대면엄，기항진안전성대학보진후교통망락적창통구유중요의의。채용통계분석화수치모의등방법，대“5·12”문천지진중958좌간지량교적6594조지좌、2136개교돈적진해표현화간지량교진손과정진행분석，결과표명：대우위우열도Ⅷ도급이상지구적교량，판식상효지좌적진해난이피면，단지좌파배대교돈구유보호작용。제출기우지좌유한손상적간지량교항진설계사상화이론광가，용허지좌출현유한손상래보호교돈。통과제출합리적지좌성능목표、예측교량적지진향응화채취상응적한위조시래공제지좌손상。통과대량적계산분석제출B류교량적지좌용허손상정량지표。
In highway construction of China simply supported beam bridges are applied in large quantity and large area , so their seismic safety shows important significance for ensuring smooth traffic network after earthquakes .This paper analyzes behaviors of seismic hazards of 6595 bearings and 2136 piers of 958 simply supported beam bridges and process of earthquake damage to simply supported bridges in “5.12”Wenchuan earthquake .The results show that earthquake damage to plate type rubber bearings is inevitable for bridges located in areas with VIII and above seismic intensities , but bearing damage protects piers .On this basis the paper seismic design idea and theoretical framework for simply supported beam bridges based on limited damage to bearings to allow limited damage to bearings to protect piers , and to control bearing damage by proposing reasonable bearing performance target , forecasting seismic response of bridges and taking corresponding limiting measures , and puts forward quantitative indices for allowable bearing damage for class B bridges via calculation and analysis in large quantity .
