论文部分内容阅读
对于在梯形及三角形荷载作用下等跨钢筋混凝土连续梁的塑性设计,目前尚无直接可以应用的支座及跨中塑性设计弯矩值。本文提出这些塑性设计弯矩值以供设计工作者应用。这些塑性设计弯矩值可用kq~2的形式来表达.式中k为塑性弯矩系数,q为沿梁单位长度荷载,为计算跨度。塑性弯距系数k按不同荷载图形具有一定的规律性,容易记忆,因而计算简便。这些塑性弯矩值也可用kM_来表达,式中M_0为简支梁跨中最大弯矩,k为一个系数,对于任何荷载图形,对外跨的支座和跨中截面均可取0.7,对内跨的支座和跨中截面均可取0.5。因此,计算更为简便。文中同时提出在计算非常简化的梁端设计剪力值。
For the plastic design of continuous reinforced concrete continuous beams under trapezoidal and triangular loads, there are no directly applicable plastic design bending moment values for bearings and midspans. This paper presents these plastic design bending moment values for designers’ applications. These plastic designed bending moment values can be expressed in the form of kq~2. where k is the plastic moment factor and q is the unit length load along the beam, which is the calculated span. The plastic bending moment coefficient k has a certain regularity according to different load patterns and is easy to remember, so the calculation is simple and convenient. These plastic moment values can also be expressed in terms of kM_, where M_0 is the maximum bending moment of the simply supported beam span, and k is a coefficient. For any load pattern, the external span supports and midspans can be taken as 0.7. Cross-section and cross-section can be taken 0.5. Therefore, the calculation is easier. The paper also proposes a very simplified design of the beam end design shear force.