PC連續(xù)剛構(gòu)橋長期下?lián)蠀?shù)敏感性分析

打開文本圖片集

QIAN Ruolin，SU Pei，HUANG Chunhui

（Civil Engineering College， Shannxi Polytechnic Institute， Xianyang 712O0O， China）

Abstract：Withthecontinuous promotionoftheconstructionofatransportation powerhouse，PCcontinuous rigidframebridges are widelyusedindiversifiedbridgeconstructionduetotheirexcellentcrossing abilityanddurability.However，theposible downarddeflectionisues thatmayoccurduringlong-termuseofthis bridgestructure haveasignificantimpactonitsstability andservice life.Basedonthefiniteelementsimulationmodeloftheentire bridge，fourmain parameters，namelyself weight， crep，prestressloss，and stfness reduction，were selectedto studythesensitivityof their downward deflection performance. Theresultsindicatethattheincreaseinoverweightofconcrete，shortinitialloadingage，bridgecompletiontime，lossof prestress，andreductioninstfnesscanallhaveadverseefectsonthelong-termdeflectionofthebidge.Targetedmeasures can efectivelyavoidthesustaineddevelopmentof long-term deflection.Inorder tomakescientific decisionsin design， construction，andoperation，and provide theoretical supportandtechnical gudance fortheconstructionofsimilarbridges.

Keywords：continuous rigid frame bridge；deflection；finite element analysis；sensitivity analysis

0 引言

現(xiàn)代社會對交通運輸系統(tǒng)的依賴程度較高，橋梁作為交通系統(tǒng)中的關(guān)鍵組成部分，其功能和結(jié)構(gòu)安全性對于社會和經(jīng)濟活動的穩(wěn)定性至關(guān)重要。（剩余5769字）