【摘要】 本文基于塑性铰线理论确定了钢筋混凝土异形板的破坏机构，并利用有限差分法计算了火灾时板内的温度场，根据高温后钢筋和混凝土的力学性能对塑性铰线截面的弯矩及灾后极限均布荷载进行了分析，为钢筋混凝土板火灾后的评估和维修提供依据．更多还原

【Abstract】 In this paper,the failure mechanism of a special shape reinforced concrete slab under uniformly distributed loading,was established based on the plastic hinge line theory,and the temperature field in slab was determined by using the finite difference method.Considering the change of mechanical behavior of concrete and steel bars after elevated temperature,the section moment of plastic hinge line and the limit uniformly distributed loading were analyzed.更多还原