【摘要】 基于美国、日本,欧洲和我国规范的支承长度设计方法,针对我国连续梁桥的特点建立评估模型,通过参数分析对各国规范的支承长度设计方法进行了比较.美国、日本和欧洲抗震规范对于支承长度的设计都给出了详细的设计方法,而中国抗震规范仅给出了针对简支梁的一个最小支承长度公式.参数分析结果表明,各国规范的支承长度远大于由非线性时程方法得到的最大墩梁相对位移.更多还原

【Abstract】 The required seating length design method in current bridge design codes of different countries was introduced.Based on the key dynamic characteristics of continuous bridges,an analytical model is adopted.Then the design method was evaluated by a nonlinear time history analysis.The design method for required seating length in current bridge design codes of USA,Japan and Europe was specified in detail,whereas only the minimum required seating length formula for simple-supported bridge in the seismic code of China was given.Parametric study shows that the required seating length in the seismic design codes of different country were considerably greater than the relative displacement between the top of the pier and the girder calculated by nonlinear time history analysis.更多还原