The static and dynamic load tests for the west bridge of south gate of xi 'an city wall are made to study the structure performance and stress conditions of hollow concrete slab arch bridge .Experiment results show that the strain calibration coefficient is between 0 .51 ~ 0 .67 ,and its deflection calibration factor is between 0 .51 ~ 0 .66 ,both of them are less than 1;First-order natural frequency of the bridge is 10 .14 Hz w hich is greater than the theoretical calculation of 9 .978 Hz and the w hole structure of the vibration curve is consistent with the theoretical calculated value .The stress performance of existing hollow concrete slab arch bridge is good and the strength ,stiffness of upper main bearing component can meet design requirements .The vibration performance of the bridge is excellent ,the measured vibration characteristics and change regulation are consistent with theoretical rules .%为了研究空腹式混凝土板拱桥梁在使用过程中的结构性能与受力状况，选用桥梁静、动载试验对桥梁静力与动力性能进行实桥检测，结果表明：西安城墙南门西桥应变校验系数在0．51～0．66之间，挠度校验系数也在0．51～0．66之间，均小于1；桥梁的一阶自振频率为10．14Hz，大于理论计算的9．978Hz，整体结构的实测振动曲线与理论计算值基本相符．在役空腹式混凝土板拱桥梁结构受力性能良好，桥梁上部主要承重构件的强度、刚度均满足要求，桥梁的振动性能较好，实测其振动特性及变化规律与理论计算值基本相符．
展开▼
