摘要
本研究以某森林公园168 m玻璃悬索桥为工程载体,系统分析桥面33 mm三层钢化夹胶玻璃在动静载试验中的力学行为。其结构组成为10 mm钢化玻璃+1.52 mm SGP离子聚合物中间膜+10 mm钢化玻璃+1.52 mm SGP中间膜+10 mm钢化玻璃。静载试验数据显示:在3.5 kN/m^(2)人群荷载下,玻璃桥面最大竖向位移为469.84 mm,显著低于T/CECS 1140-2022规范限值L/250,位移校验系数0.85~0.89符合JTG/T J21-01-2015要求;应变校验系数在0.85~0.89之间且残余应变率低于14%,证实玻璃-钢结构协同变形机制的有效性。动载试验测得结构基频为1.938 Hz,较理论值(1.501 Hz)提升29.1%,阻尼比为0.924,凸显SGP中间膜对动态刚度的增强作用。试验表明SGP膜的层间剪切耗能机制可抑制振动响应,但需监测人流密集时段的异常振动以预防界面疲劳损伤。
This study took a 168-meter glass suspension bridge in a forest park as the engineering carrier,and systematically analyzed the mechanical behavior of the 33 mm three-layer tempered laminated glass on the bridge deck under static and dynamic load tests.Its structural composition was as follows:10 mm tempered glass+1.52 mm SGP ionic polymer interlayer+10 mm tempered glass+1.52 mm SGP interlayer+10 mm tempered glass.The static load test data showed that:under a crowd load of 3.5 kN/m^(2),the maximum vertical displacement of the glass deck is 469.84 mm,which is significantly lower than the limit value of L/250 specified in the T/CECS 1140-2022 standard;the displacement calibration coefficient ranging from 0.85 to 0.89 meets the requirements of JTG/T J21-01-2015;the strain calibration coefficient is between 0.85 and 0.89,and the residual strain rate is less than 14%,which confirms the effectiveness of the collaborative deformation mechanism between the glass and steel structures.The dynamic load test shows that the fundamental frequency of the structure is 1.938 Hz,which is 29.1%higher than the theoretical value of 1.501 Hz,and the damping ratio is 0.924,highlighting the enhancement effect of the SGP interlayer on the dynamic stiffness.The test indicated that the interlayer shear energy dissipation mechanism of the SGP film can suppress vibration responses,but it is necessary to monitor abnormal vibrations during periods of dense pedestrian flow to prevent interface fatigue damage.
作者
母昌辉
杨建荣
MU Changhui;YANG Jianrong(Department of Civil Engineering,Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China;Earthquake Engineering Researching Center of Yunnan,Kunming 650500,China)
出处
《材料导报》
北大核心
2025年第S2期71-76,共6页
Materials Reports
关键词
夹层玻璃
SGP离子聚合物
动静载试验
界面力学
悬索桥
laminated glass
SGP ionomer
static and dynamic load test
interface mechanics
suspension bridge
