中美规范港区水泥混凝土面板接缝设计对比

Comparison of joint design for cement concrete slab in port area between Chinese and American codes

针对国内外规范关于港区水泥混凝土面板接缝设计存在较大差异的问题,对比中、美规范在接缝形式、间距和荷载传递机制的异同点,并通过调研和有限元计算分析温度、地基刚度和荷载对接缝的影响,提出采用限制板长和相对刚度半径比与板块应力分析相结合的方法确定接缝间距。结果表明,水泥混凝土面板应少设或不设胀缝,且接缝应带有传力杆,以便更好地传递荷载。

Aiming at the great discrepancy of the joint design for cement concrete slab in port area in China and abroad,we compare the similarities and differences of joint types,spacing and load transfer mechanism between Chinese and American codes,analyze the effects of temperature,subgrade stiffness and loads on the joint through investigation and finite element calculation,and propose the method combining the limitation of the ratio of slab length and radius of relative stiffness and the analysis of tension stress to determine the joint spacing.The results show that there should be less or no expansion joints in the cement concrete slab,and all joints should be provided with dowel bars to transfer load better.