排序方式: 共有9条查询结果,搜索用时 15 毫秒
1
1.
2.
3.
尾管悬挂器是用来悬挂尾管并将尾管与上层套管相连接的装置,在尾管固井中具有重要作用。目前尾管固井日益增多,所使用的尾管悬挂器结构多种多样。在现场尾管固井实施过程中出现了环空不畅、替压过高和提前坐挂等井下复杂情况。介绍和分析了尾管悬挂器的结构、性能特点及优缺点,总结了在现场应用中易出现的事故预防及处理措施。 相似文献
4.
为保证大跨度空间钢结构支吊架抗震施工技术在城市建设与规划过程中发挥积极效用,需对其进行研究。提出一种基于BIM技术的大跨度空间钢结构支吊架的抗震施工方法,该方法介绍大跨度空间钢结构支吊架的组成及其抗震施工布置要求、施工依据和施工工序,并阐述BIM技术在钢结构支吊架结构抗震施工中的具体应用,包括施工流程和施工原则。通过模拟工程实例分析证明,采用BIM技术进行抗震施工后的大跨度空间钢结构支吊架试件的承载力和抗侧刚度均有明显提升,在地震发生初期承担了建筑结构的大部分地震内力,具有较好的抗震性能。 相似文献
5.
大跨度空间钢结构设计中,合理选取支吊架对建筑的抗震性有着重要的影响,当前设计过程中未考虑支吊架组合后的抗震性能。综合选取适用于大跨度空间钢结构的支吊架结构,使其具有更优的抗震性能。首先给出目前应用较多的三种结构,其次给出一定的抗震约束条件,如承载力、应力应变与拉伸变形等。在条件约束下,给出具有抗震能力的支吊架选取模型并给出具体计算示例,选取和组合具有一定抗震能力的大跨度空间钢结构支吊架。结果表明,相较于传统的随机支吊架选取方式,具有抗震能力的模型下支吊架核心钢结构抗震水平明显提升。 相似文献
6.
Strength design method for tubing hanger of subsea christmas tree against big temperature difference
The tubing hanger is an important component of the subsea Christmas tree, experiencing big temperature difference which will lead to very high thermal stresses. On the basis of API 17D/ISO 13628-4 and ASME VIII-1, and by comprehensively considering the erosion of oil and the gravity load of the tubing, a calculation model is established by regarding design pressure and thermal stress, and the method for designing the tubing hanger of the horizontal Christmas tree under big temperature difference condition is developed from the fourth strength theory. The proposed theory for strength design of the tubing hanger in big temperature difference is verified by numerical results from ABAQUS. 相似文献
7.
8.
在地震作用下,抗震支吊架理应保障建筑机电工程设施和管道系统均具备良好的服役性能。因此,对抗震支吊架的抗震性能进行检测至关重要。本文以某典型地下室抗震支吊架为对象开展了顺管向地震模拟振动台试验,通过多工况试验对比分析了不同支吊架的位移和加速度的地震响应。试验结果表明:抗震支吊架显著降低了管道位移,减振率最高可达到96%,但对于加速度响应的抑制作用较小。易损性分析表明:采用成品支吊架时,管道系统在遭受相当于设防烈度的地震作用时会发生严重损伤,而采用抗震支吊架的管道系统能够保全其功能。 相似文献
9.
Selcuk Bas Chuan-Zhi Dong Nurdan M. Apaydin Alper Ilki F. Necati Catbas 《地震工程与结构动力学》2020,49(14):1496-1518
The effects of hanger replacement from inclined to vertical configuration on seismic response of long-span suspension bridges are investigated considering multi-support earthquake excitation. The Bosphorus Bridge is investigated due to its recent comprehensive rehabilitation, mainly involving hanger replacement. The finite-fault stochastic simulation method (FINSIM) is utilized for multi-point earthquake time-history generation. The developed finite element (FE) model both for the inclined and vertical hanger arrangement are verified through the structural health monitoring (SHM) data. Based on the comparative analysis, the tension force of vertical hangers is found to be lower than that of inclined hangers, whereas the tension force of the main and back-stay cables remains the same. The compressive axial force of the deck decreases relatively in the case of the vertical hanger arrangement, whereas the cross-sectional forces at the tower base section increase. The approach viaducts are not affected by the vertical hanger arrangement. According to the demand/capacity ratios for damage estimation under the max. earthquake (2475 years return period), structural damage on the tower base section may be expected for both hanger arrangements, while these sections perform well under design scenario earthquake. The expansion joint of the bridge with inclined hangers is also estimated to be damaged; however, this displacement is lower in the case of the vertical hanger arrangement due to the viscous dampers. The findings also reveal that a change in hanger form of a suspension bridge can necessitate other structural retrofit, such as using viscous dampers to limit longitudinal displacements of the deck and retrofitting the bridge towers. 相似文献
1