【正文】
此外,合理的薄壁墩的壁厚、橋墩剛度和局部穩(wěn)定問題都是在設(shè)計高墩連續(xù)剛構(gòu)橋時需要考慮的因素。百米以上超高墩連續(xù)剛構(gòu)橋,其設(shè)計除進行傳統(tǒng)的應力與強度控制外,更關(guān)鍵的因素有:超高墩穩(wěn)定、風載效應、橫橋脈動風引起的抖振以及橫橋向抖振而導致的行車舒適性及服務(wù)能力的下降、地震響應等。高橋墩的設(shè)計,逐步成為一個重點研究的問題。因此,預應力連續(xù)剛構(gòu)橋在近四十年間得到了較快地發(fā)展。由中交第一路勘察設(shè)計研究院有限公司設(shè)計的陜西三水河特大橋,最大墩高達183 m,將該類橋型墩高記錄進一步刷新。關(guān)鍵詞:薄壁高墩;剛構(gòu)橋;薄壁高墩;高墩設(shè)計;穩(wěn)定abstract: the highway construction in our country is in a period of rapid development now. as the preferred type of continuous rigid frame bridge in mountainous area, height of piers is increasing. through the application of the continuous rigid frame bridge, introduced its key design technology, the conclusion is significant for highpier bridge design.key words: thinwall and high pier。 rigid frame bridge。大跨徑連續(xù)剛構(gòu)橋的技術(shù)特點及應用簡支梁是橋梁中最簡單的型式,但跨越能力不大,隨著跨徑的增