| 摘要: |
| 全直桩框架码头通过能力大，能适应内河大水位差条件要求，在我国西南山区河流码头建设中广泛应用。该结构由于构件数量多、受力条件复杂，构件传力途径和薄弱环节难以确定。运用基于结构广义刚度的重要性评价方法，分别计算船舶荷载作用下和荷载组合作用下框架码头构件重要性系数，对传力途径及薄弱环节进行分析。结果表明：桩柱的重要性普遍大于梁，桩柱的重要性呈现“上小下大”的趋势，梁的重要性则与船舶撞击位置有关；通过重要性系数分析可知，前排桩基、后排桩基、最高层前边梁、排架底层最后方节点和最前方节点等5处为内河框架码头的薄弱环节，在设计中应预留足够安全储备；框架码头的主要传力途径由结构最外层构件组成。研究结果可为码头结构优化提供参考依据。 |
| 关键词: 全直桩框架码头 重要性评价 薄弱环节 传力途径 |
| DOI： |
| 分类号:U656.1+24 |
| 基金项目:国家科技支撑计划课题资助项目（2012BAB05B04）；国家自然科学基金资助项目(51479014)；交通运输部科技计划资助项目（2014329814070） |
|
| Importance evaluation and weak link analysis for members of overhead vertical wharfs located at inland rivers |
|
LIU Ming-wei1, LI Peng-fei1, CHEN Gang2, WENG Zhen-yan3
|
|
1.National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong University, Chongqing;2.Key Laboratory of the Ministry of Education on Hydraulic & Water Engineering, Chongqing Jiaotong University;3.Fujian Tendering Corporation
|
| Abstract: |
| As all-vertical-piled frame wharfs not only have large capacity but also are able to adapt to the conditions of large water level difference. Such wharfs are widely used in construction of ports located at southwest mountain rivers. However, this kind of structure has so many members and the force condition is so complicated that it is hard to determine the force transmission route and weak links of the members. A method for evaluating importance, which is based on generalized stiffness, is applied in calculating importance factors of wharf members, under the situation of only ship load and combined load, separately, and analyzing force transmission route and weak links. The analysis results indicate that piles are more important than beams. Generally, the upper members of the piles are less important than the lower members, and the importance of beams is related to the impact location of ships. According to importance factors, there are five weak links in the inland river wharfs: the front piles, piles located in back row, the front beam of the top layer, and the rear and front nodes of the bottom bent frame. So, enough safety stock for the above weak links should be reserved in design. The force transmission route of the frame wharf is mainly constituted by the outmost members. The research results will provide a reference basis for structure optimization of the frame wharfs. |
| Key words: all-vertical-piled frame wharf importance evaluation weak link force transmission route |
