地下空间上方设置钢弹簧浮置板减振设计

交通荷载可引起地下空间结构的低频振动与人群的不舒适感,对地下空间造成一定的影响。采用钢弹簧浮置板进行减振是一种较好的方法。以广州市番禺区万博商务中心核心区地下空间上方市政道路为工程背景,对钢弹簧浮置板减振结构设计进行分析。分析结果表明,设置钢弹簧浮置板可明显降低地下空间结构主要振动模态的固有频率,脱离汽车荷载的特征频率范围,汽车荷载下地下空间结构顶板的加速度响应明显降低。钢弹簧浮置板能够吸收绝大部分振动能量,减小结构振动响应。

Structural design of vibration isolation for steel spring floating slab above underground space

Traffic load can cause low-frequency vibration of underground space structure and people's discomfort, which has a certain impact on underground space. It is a good method to use steel spring floating slab to reduce vibration. Taking the municipal road above the underground space of Wanbo Business Center in Panyu District of Guangzhou as the engineering background, the vibration isolation structure design of steel spring floating slab was analyzed. The study results show that the natural frequencies of the main vibration modes of underground space structures can be significantly reduced by installing steel spring floating slabs, which are separated from the characteristic frequency range of vehicle loads. After installing steel spring floating slabs, the acceleration response of the roof of underground space structures under vehicle loads decreases significantly. The steel spring floating slabs can absorb most of the vibration energy, and reduce structural vibration response.