铰接斜板桥计算理论与荷载试验

Calculation theory and load tests of the jointed skew slab bridge

建立了单梁式斜交桥挠度和扭转角的计算公式,并以此公式为基础,给出了铰接斜交板桥荷载横向分布系数的计算方法,编制了计算程序。为解决斜交板桥纵向加载计算,给出了截面弯矩和扭矩影响线计算公式,分析了斜交板桥截面弯矩影响线的变化规律。以湖南省望城县金城大道新建工程八曲河中桥为工程背景,运用给出的计算理论,计算出各板荷载的横向分布系数。本研究还制定了试验检测方案,比较了试验检测结果与理论结果,两者得到的结果接近,证明该方法是正确的。

Deflection and Rotation angel formula were established for the single span regular skew slab bridge.A jointed skew slab method was presented as a live distributing factor and key formula were derived.Based on this theory,a calculation code was compiled.Using theoretical formula,the change of moment influence lines with skew angels,flexure-torsion stiffness ratio and calculation positions was shown.Using Baqu River Bridge as the engineering background,live distributing factors were calculated and a testing scheme was decided.Testing results are compared with theoretical results,which agrees with each other well.The method is corrective.