世界桥梁
世界橋樑
세계교량
World Bridges
2015年
5期
30-35
,共6页
梁式桥%板式橡胶支座%自由滑动%X形板弹塑性挡块%混凝土挡块%抗震性能%模型试验
樑式橋%闆式橡膠支座%自由滑動%X形闆彈塑性擋塊%混凝土擋塊%抗震性能%模型試驗
량식교%판식상효지좌%자유활동%X형판탄소성당괴%혼응토당괴%항진성능%모형시험
beam bridge%laminated elastomeric bearing%free sliding%X-shaped elasto-plastic plate stopper%concrete stopper%seismic performance%model test
为研究板式橡胶支座梁桥横向约束体系的减震性能，制作某（30＋30） m两跨一联的桥面连续简支梁桥大比例缩尺全桥结构模型，对缩尺模型进行振动台试验，研究无约束自由滑动体系、X形板弹塑性挡块约束体系及钢筋混凝土挡块约束体系的地震反应。试验结果表明：地震动输入过程中，板式橡胶支座、X形板弹塑性挡块及钢筋混凝土挡块均有损伤或弹塑性变形，提供体系的能耗增加；随着地震强度的增加，无约束自由滑动体系中板式橡胶支座发生滑动，梁体出现永久残余位移；设置钢筋混凝土挡块体系的墩梁最大相对位移最小；X形板弹塑性挡块体系能大量耗散地震能量，有效减少墩梁间相对位移以及传递至下部结构的梁体地震力，使桥墩及基础免遭严重损伤，减震性能较好。
為研究闆式橡膠支座樑橋橫嚮約束體繫的減震性能，製作某（30＋30） m兩跨一聯的橋麵連續簡支樑橋大比例縮呎全橋結構模型，對縮呎模型進行振動檯試驗，研究無約束自由滑動體繫、X形闆彈塑性擋塊約束體繫及鋼觔混凝土擋塊約束體繫的地震反應。試驗結果錶明：地震動輸入過程中，闆式橡膠支座、X形闆彈塑性擋塊及鋼觔混凝土擋塊均有損傷或彈塑性變形，提供體繫的能耗增加；隨著地震彊度的增加，無約束自由滑動體繫中闆式橡膠支座髮生滑動，樑體齣現永久殘餘位移；設置鋼觔混凝土擋塊體繫的墩樑最大相對位移最小；X形闆彈塑性擋塊體繫能大量耗散地震能量，有效減少墩樑間相對位移以及傳遞至下部結構的樑體地震力，使橋墩及基礎免遭嚴重損傷，減震性能較好。
위연구판식상효지좌량교횡향약속체계적감진성능，제작모（30＋30） m량과일련적교면련속간지량교대비례축척전교결구모형，대축척모형진행진동태시험，연구무약속자유활동체계、X형판탄소성당괴약속체계급강근혼응토당괴약속체계적지진반응。시험결과표명：지진동수입과정중，판식상효지좌、X형판탄소성당괴급강근혼응토당괴균유손상혹탄소성변형，제공체계적능모증가；수착지진강도적증가，무약속자유활동체계중판식상효지좌발생활동，량체출현영구잔여위이；설치강근혼응토당괴체계적돈량최대상대위이최소；X형판탄소성당괴체계능대량모산지진능량，유효감소돈량간상대위이이급전체지하부결구적량체지진력，사교돈급기출면조엄중손상，감진성능교호。
To study the seismic mitigation performance of transverse restraint system of beam bridge with laminated elastomeric bearings ,the large‐scale model of the whole bridge structure of a continuous‐deck simply‐supported bridge with a continuous unit of two spans of (30+30) m was prepared ,on which shaking table test was conducted .The seismic reaction of the free sliding sys‐tem without restraints ,X‐shaped elasto‐plastic plate stopper restraint system and the reinforced concrete stopper restraint system was studied .The results of the study indicate that during the in‐put of seismic vibration ,the laminated elastomeric bearings ,X‐shaped elaso‐plastic plate stoppers and reinforced concrete stoppers all showed signs of damage or elasto‐plastic deformation ,and the seismic energy transferred to the system enhanced .As seismic strength was increasing ,the bear‐ings in the free sliding system without restraints began to slide and permanent residual displace‐ment was found in the beam .When the reinforced concrete stoppers were added ,the maximum relevant displacement of the pier and girder is the smallest .X‐shaped elasto‐plastic plate stoppers can considerably dissipate seismic energy in an earthquake ,effectively reducing the relevant dis‐placement between the pier and the girder and the seismic energy transferring from the beam to the substructure ,preventing occurrence of severe damage in the piers and the foundation ,and exhibi‐ting good seismic mitigation performance .
