关键词: 斜拉桥, 二次调索, 成桥状态, 影响矩阵法, 惩罚函数法

Abstract: In?order?to?improve?the?structure?security?and?guarantee?the?girder＇s?safety?in?the?construction?of?cable-stayed?bridges,?cables?should?be?tensioned?twice?and?then?the?expected?completed?state?can?be?achieved?at?last.?A?good?method?is?proposed?to?calculate?the?cable?tension?forces?and?the?adjusted?order.?Based?on?the?theory?of?influence?matrix,?an?optimized?control?model?to?solve?the?second?cable?adjustment?is?established,?and?the?method?of?penalty?function?is?used.?This?method?has?many?advantages,?such?as?high?preciseness,?convenience?and?practice?etc.?,?which?can?also?be?used?to?minimize?the?error?of?the?cable?tension?force?at?the?completed?state.

Key words: cable-stayed bridge , secondary cable-adjustment , completed state , influence matrix method , penalty function method ;