广东公路交通
廣東公路交通
엄동공로교통
GUANGDONG HIGHWAY COMMUNICATIONS
2014年
4期
29-33
,共5页
桥梁%旧桥改造%力学性能%测试分析
橋樑%舊橋改造%力學性能%測試分析
교량%구교개조%역학성능%측시분석
bridge%old bridge improvement%mechanical properties%test analysis
佛开高速公路北江大桥采用主桥拆除重建、引桥顶升加固的改造方案。由于引桥连续工字梁存在结构性病害，顶升对梁体的影响需进行评估。同时，顶升误差将导致梁体产生次应力，可能导致梁体出现新的损伤，此外，顶升过程中连续工字梁的结构体系多次发生转换，多次体系转换后梁体的受力性能是否满足要求需进行分析。对北江大桥引桥连续工字梁的典型联跨改造前后的受力性能进行分析，得到其受力性能的变化规律，为桥梁改造施工提供理论依据。
彿開高速公路北江大橋採用主橋拆除重建、引橋頂升加固的改造方案。由于引橋連續工字樑存在結構性病害，頂升對樑體的影響需進行評估。同時，頂升誤差將導緻樑體產生次應力，可能導緻樑體齣現新的損傷，此外，頂升過程中連續工字樑的結構體繫多次髮生轉換，多次體繫轉換後樑體的受力性能是否滿足要求需進行分析。對北江大橋引橋連續工字樑的典型聯跨改造前後的受力性能進行分析，得到其受力性能的變化規律，為橋樑改造施工提供理論依據。
불개고속공로북강대교채용주교탁제중건、인교정승가고적개조방안。유우인교련속공자량존재결구성병해，정승대량체적영향수진행평고。동시，정승오차장도치량체산생차응력，가능도치량체출현신적손상，차외，정승과정중련속공자량적결구체계다차발생전환，다차체계전환후량체적수력성능시부만족요구수진행분석。대북강대교인교련속공자량적전형련과개조전후적수력성능진행분석，득도기수력성능적변화규률，위교량개조시공제공이론의거。
Demolition and reconstruction have been implemented for the main bridge of Beijiang Bridge, jacking and reinforcing method have been designed for the approach bridges. Due to existing structural disease of the continuous I-beams, the effect of lifting to the beams has to be evaluated. At the same time, lifting error may lead to secondary stress of the beams, which may cause new damages; in addition, as many conversions of the continuous beams have occurred during the jacking process, it has to be analyzed that if the stress properties of the beams could meet the requirements after several times of system conversions. By studying on stress properties before and after the reinforcing of the typical combination of continuous I-beams of Beijiang Bridge, the change law of the stress properties has been obtained, which will provide theoretical basis for the bridge construction.
