某超限高层复杂建筑结构设计与创新应用——以全国大学生结构设计信息技术大赛特等奖作品为例

Structural design and innovative application of an excessive high-rise building ——Taking the grand Prize of national college students'structural design infor mation technology competition as an example

为探究超限高层复杂建筑结构的整体性能,以第五届全国大学生结构设计信息技术大赛赛题商住楼结构模型为案例,依据行业相关规范对赛题结构典型的超限情况、抗震设计和结构选型进行探讨,基于可视化GSCAD平台,对模型调整结果对比分析,验证对案例建筑结构设计构思的正确性和合理性。结果表明:1)结构超限高层凹凸不规则中的局部不规则处的结构布置对结构整体的位移比影响较大,因此在结构布置时,可反向调整位置,以减小结构位移比;2)优化模型在设定的所有工况下的结构位移角、楼层剪力、弯矩均满足规范限制要求,且位移比均小于1.5;3)各层的质量、质心和刚度中心沿楼层高度均匀分布;4)x、y方向楼层侧向刚度比均大于1.0。

In order to study the hydration heat of concrete, focusing on a massive concrete pile cap of an industrial park project, this paper introduced relevant construction techniques and control measures, and built a three-dimensional model by finite element analysis to study the effect of cooling pipe.The results showed that the concrete surface takes about 2 days to reach the highest temperature but then cools quickly, while the core of concrete takes 3~4 days.Moreover, injecting 0.8 m/s water into a pipe with an inner diameter of 30 mm has a better cooling effect.The temperature difference between the surface and the interior of concrete can be controlled within 25℃,making the tensile stress on the concrete surface lower than the tensile strength.It is advisable to cover the concrete surface with felt after the age of 2 days, to delay the cooling of surface concrete and control the temperature difference between the surface and the interior.