| 1. | Kinds of structural system were analyzed to find their effects on the structural behaviors
分析了结构体系变化对多塔斜拉桥结构行为的影响。 |
| 2. | Multispan cable - stayed bridges with diverse heights and types of towers were discussed
比较了桥塔型式及高度对多塔斜拉桥结构行为的影响； 7 |
| 3. | Research on the effect which is caused on structural stiffness by structural arrangements was conducted
研究了多塔斜拉桥的各种结构布置方式对结构刚度的影响。 |
| 4. | 3 . the effect on structural behavior aroused by rigidity distribution among different main components . 4
讨论了多塔斜拉桥主要构件间的刚度分布对结构行为的影响。 |
| 5. | The differences of mechanical behaviors between multispan cable - stayed bridges and the custom two - tower type were given in the comparison
比较了多塔斜拉桥与普通两塔斜拉桥的力学行为差异。 |
| 6. | The intermediate piers in the side - spans of multispan cable - stayed bridges were analyzed to discuss their stiffening effects on the type of bridge
讨论了边跨辅助墩对多塔斜拉桥的加劲效果。 |
| 7. | Finally , some constructive suggestion on the design and construction of multispan cable - stayed bridges were gained from the study above
通过以上的讨论，最后得出一些有利于多塔斜拉桥设计的建议。 |
| 8. | Accordingly , in this essay all kinds of factors that affect mechanical characteristics of multispan cable - stayed bridges were discussed and researched as followed : 1
为此，本论文对影响多塔斜拉桥力学行为的各种因素进行了分析与讨论，主要开展了以下几个方面的工作： 1 |
| 9. | 7 . as for multispan cable - stayed bridges with stiffening cables , different arrangement of stiffening cables were given and the variance of temperature among cables , girders and towers were considered as well
对设置加劲索的多塔斜拉桥，讨论了加劲索的布置方式及索与梁、塔之间的温差对加劲效果的影响。 |
| 10. | Since the first multispan cable - stayed bridge was designed and built in 1960s , the structural stiffness has been the block of this type of bridges " popularization . in 1990s bridge engineers of the world once again payed their attention to the sort of bridges and showed preference for how to insure the whole structural stiffness as well as the beautiful appearance
尽管在上世纪六十年代就已建成世界上第一座多塔斜拉桥，然而多塔斜拉桥的结构刚度问题却一直制约着该桥型的发展，直到20世纪90年代，多塔斜拉桥又受到了国内外工程师们的关注，如何在确保多塔斜拉桥的结构整体刚度的同时又使结构显得美观，成为发展多塔斜拉桥这一桥型所面临的关键问题。 |
