大跨預(yù)應(yīng)力混凝土樓蓋的雙向加速度分布規(guī)律及舒適度分析研究
[Abstract]:The long-span prestressed concrete floor has low stiffness, small damping, and the minimum frequency is close to the frequency of walking and jumping. Under pedestrian excitation, resonance is inevitable, which makes people feel uncomfortable. On the basis of summing up and analyzing the vertical peak acceleration of floor and the bidirectional distribution of acceleration curve of each control point in the floor, the finite element analysis model of large-span prestressed concrete floor structure is established in this paper. The dynamic response of the selected floor scheme under three pedestrian excitation conditions is analyzed. At the same time, through the acceleration distribution curve of floor, the comfort degree of floor is evaluated. The results show that the acceleration is basically a parabola distribution about the axial symmetry of the floor. The initial state of the floor has a great influence on the peak acceleration of the floor vibration, which may lead to the increase of the peak acceleration of the floor in the initial stage of vibration. It provides a reference for the deep study of the comfort degree of long span prestressed concrete floor structure and the design of vibration absorption and isolation.
【作者單位】: 西安建筑科技大學(xué)土木工程學(xué)院;河北建筑設(shè)計(jì)研究院有限責(zé)任公司;
【基金】:國家自然科學(xué)基金面上項(xiàng)目(51278395) 陜西省教育廳專項(xiàng)基金(12JK0895)
【分類號(hào)】:TU378
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