后張預應力混凝土矩形雙向板有效預拉力直接設計法
周旭岐
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（北京中聯(lián)環(huán)建文建筑設計有限公司，北京 100086）［摘要］建立了預應力混凝土雙向板的平衡荷載法與現(xiàn)行規(guī)范的截面裂縫控制驗算應力表達式之間互通的力學條件與數(shù)學關(guān)系式，提出了后張預應力混凝土矩形雙向板在正常使用極限狀態(tài)下有效預拉力的直接設計法。最后闡述了當預應力雙向板的支承邊為梁時，在設計中應注意的3個問題。［關(guān)鍵詞］后張預應力混凝土；雙向板；荷載平衡法；裂縫控制驗算；有效預拉力Direct design method for effective prestress force of post-tensioned prestressed concrete two-way slabZhou Xuqi（United Architects & Engineers Co.,Ltd.，Beijing 100086,China）Abstract:It establishes mechanical qualification and mathematical model between the load-balancing method and the formula for the differential prestress limit based on the crack control test. The direct design method for the effective prestress of the prestressed concrete two-way slab in the service limit state are determined.In the end, it explained three problems in design when this slab′s supporting is beem.Keywords:post-tensioned prestressed concrete; two-way slab; loadbalancing method;the Crack-control test; effective prestress force作者簡介：周旭岐，一級注冊結(jié)構(gòu)工程師，教授級高工。Email:ydmzxq@yahoo.com.cn。
