基于ANSYS软件的塔式结构上浮数值模拟方法研究与应用

Study and Application of Numerical Simulation Method for Tower Structure Floating Based on ANSYS Software

塔式结构上浮现象普遍存在,开展该类结构上浮特点的数值模拟研究很有必要。因此,对基于ANSYS软件塔式结构上浮数值模拟方法与应用进行了研究。结合已有类似工程的实测数据结论,提出了数值模拟方法,构建了带1层地下室的双塔对称结构,将得到的竖向变形曲线规律与已有实测数据规律进行对比,吻合较好,证明采用的数值模拟方法是合理的,并发现地下室底板塔楼区域主要发生局部上浮,且底板下表面裂缝将发生在该区域与竖向构件交界附近,停车区域以整体上浮为主,底板上表面裂缝将发生在该区域,但不在跨中。在此基础上,对多种加重补救措施进行对比分析,表明采用加重底板比加重顶板效果显著,中间三跨均匀加载方式略显优势。

It is necessary to study the characteristic of tower structure floating by using numerical simulation, because the floating is universal. In this paper, the study and application of numerical simulation method for this tower structure floating based on ANSYS finite software was conducted. Based on the conclusions based on the testing data from similar structures, the numerical simulation method was proposed. Through the application of the method to a symmetric twin-tower structure with one basement, the results showed the method was proved rational, because the deformation law from the method was well agreement with the deformation law from the testing data.Under the buoyancy, the deformation directions of the intersection region between basement and towers were not uniform, while the deformation directions of the parking region of basement were uniform. The bottom slab crack might come into being in the former region,while the top slab crack would come into being in the latter region. The displacement with the treatment of putting the added mass on the bottom floor of basement was smaller than that by putting the added mass on the top floor of basement. The displacement by loading the added mass on the three continuous span nearby the middle span was little smaller than that by the other ways.