【摘要】 文章介绍了钢筋混凝土叠合楼板和人行荷载的一般特性;引入接触单元,利用有限元程序数值模拟计算钢筋混凝土叠合楼板的振动响应;分析了叠合面、现浇层厚度和钢筋桁架高度对叠合楼板自振频率的影响以及人行荷载下叠合楼板振动加速度及其舒适度,并与对应钢筋混凝土现浇板进行比较。计算结果表明,相同条件下,叠合楼板振动峰值加速度要比现浇楼板大,后浇混凝土叠合层厚度对楼板振动峰值加速度及舒适度影响明显,增加后浇叠合层厚度,有利于改善叠合楼板振动舒适度。更多还原

【Abstract】 The general characteristics of reinforced concrete composite floor and walking load are presented. By introducing contact element, the vibration response of reinforced concrete composite floor is numerically simulated with finite element program. The influence of overlay surface, thickness of cast-in-situ layer and height of steel truss on the natural vibration frequency of composite floor, vibration acceleration and serviceability of composite floor under walking load are analyzed, and the results are compared with those of corresponding cast-in-situ reinforced concrete floor. The calculation results show that the peak accelerations of vibration of composite floor are larger than those of cast-in-situ floor under the same conditions. The thickness of post-poured concrete composite floor has obvious influence on the peak acceleration and serviceability of vibration of composite floor. Increasing the thickness of post-poured composite floor is beneficial to improving the vibration serviceability of composite floor.更多还原